638329860

素因数分解:

$2^2\times 3^2\times 5^1\times 7^5\times {\mathrm{211}}^1$

素因数の和:261

約数の個数: 216

約数和(自身を含む): 2269665216

約数和(自身を除く): 1631335356

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 49, 60, 63, 70, 84, 90, 98, 105, 126, 140, 147, 180, 196, 210, 211, 245, 252, 294, 315, 343, 420, 422, 441, 490, 588, 630, 633, 686, 735, 844, 882, 980, 1029, 1055, 1260, 1266, 1372, 1470, 1477, 1715, 1764, 1899, 2058, 2110, 2205, 2401, 2532, 2940, 2954, 3087, 3165, 3430, 3798, 4116, 4220, 4410, 4431, 4802, 5145, 5908, 6174, 6330, 6860, 7203, 7385, 7596, 8820, 8862, 9495, 9604, 10290, 10339, 12005, 12348, 12660, 13293, 14406, 14770, 15435, 16807, 17724, 18990, 20580, 20678, 21609, 22155, 24010, 26586, 28812, 29540, 30870, 31017, 33614, 36015, 37980, 41356, 43218, 44310, 48020, 50421, 51695, 53172, 61740, 62034, 66465, 67228, 72030, 72373, 84035, 86436, 88620, 93051, 100842, 103390, 108045, 124068, 132930, 144060, 144746, 151263, 155085, 168070, 186102, 201684, 206780, 216090, 217119, 252105, 265860, 289492, 302526, 310170, 336140, 361865, 372204, 432180, 434238, 465255, 504210, 506611, 605052, 620340, 651357, 723730, 756315, 868476, 930510, 1008420, 1013222, 1085595, 1302714, 1447460, 1512630, 1519833, 1861020, 2026444, 2171190, 2533055, 2605428, 3025260, 3039666, 3256785, 3546277, 4342380, 4559499, 5066110, 6079332, 6513570, 7092554, 7599165, 9118998, 10132220, 10638831, 13027140, 14185108, 15198330, 17731385, 18237996, 21277662, 22797495, 30396660, 31916493, 35462770, 42555324, 45594990, 53194155, 63832986, 70925540, 91189980, 106388310, 127665972, 159582465, 212776620, 319164930, 638329860]

約数ペア:

[(1, 638329860), (2, 319164930), (3, 212776620), (4, 159582465), (5, 127665972), (6, 106388310), (7, 91189980), (9, 70925540), (10, 63832986), (12, 53194155), (14, 45594990), (15, 42555324), (18, 35462770), (20, 31916493), (21, 30396660), (28, 22797495), (30, 21277662), (35, 18237996), (36, 17731385), (42, 15198330), (45, 14185108), (49, 13027140), (60, 10638831), (63, 10132220), (70, 9118998), (84, 7599165), (90, 7092554), (98, 6513570), (105, 6079332), (126, 5066110), (140, 4559499), (147, 4342380), (180, 3546277), (196, 3256785), (210, 3039666), (211, 3025260), (245, 2605428), (252, 2533055), (294, 2171190), (315, 2026444), (343, 1861020), (420, 1519833), (422, 1512630), (441, 1447460), (490, 1302714), (588, 1085595), (630, 1013222), (633, 1008420), (686, 930510), (735, 868476), (844, 756315), (882, 723730), (980, 651357), (1029, 620340), (1055, 605052), (1260, 506611), (1266, 504210), (1372, 465255), (1470, 434238), (1477, 432180), (1715, 372204), (1764, 361865), (1899, 336140), (2058, 310170), (2110, 302526), (2205, 289492), (2401, 265860), (2532, 252105), (2940, 217119), (2954, 216090), (3087, 206780), (3165, 201684), (3430, 186102), (3798, 168070), (4116, 155085), (4220, 151263), (4410, 144746), (4431, 144060), (4802, 132930), (5145, 124068), (5908, 108045), (6174, 103390), (6330, 100842), (6860, 93051), (7203, 88620), (7385, 86436), (7596, 84035), (8820, 72373), (8862, 72030), (9495, 67228), (9604, 66465), (10290, 62034), (10339, 61740), (12005, 53172), (12348, 51695), (12660, 50421), (13293, 48020), (14406, 44310), (14770, 43218), (15435, 41356), (16807, 37980), (17724, 36015), (18990, 33614), (20580, 31017), (20678, 30870), (21609, 29540), (22155, 28812), (24010, 26586)]