21423780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^3\times {\mathrm{347}}^1$

素因数の和:383

約数の個数: 144

約数和(自身を含む): 76003200

約数和(自身を除く): 54579420

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, 245, 252, 294, 315, 343, 347, 420, 441, 490, 588, 630, 686, 694, 735, 882, 980, 1029, 1041, 1260, 1372, 1388, 1470, 1715, 1735, 1764, 2058, 2082, 2205, 2429, 2940, 3087, 3123, 3430, 3470, 4116, 4164, 4410, 4858, 5145, 5205, 6174, 6246, 6860, 6940, 7287, 8820, 9716, 10290, 10410, 12145, 12348, 12492, 14574, 15435, 15615, 17003, 20580, 20820, 21861, 24290, 29148, 30870, 31230, 34006, 36435, 43722, 48580, 51009, 61740, 62460, 68012, 72870, 85015, 87444, 102018, 109305, 119021, 145740, 153027, 170030, 204036, 218610, 238042, 255045, 306054, 340060, 357063, 437220, 476084, 510090, 595105, 612108, 714126, 765135, 1020180, 1071189, 1190210, 1428252, 1530270, 1785315, 2142378, 2380420, 3060540, 3570630, 4284756, 5355945, 7141260, 10711890, 21423780]

約数ペア:

[(1, 21423780), (2, 10711890), (3, 7141260), (4, 5355945), (5, 4284756), (6, 3570630), (7, 3060540), (9, 2380420), (10, 2142378), (12, 1785315), (14, 1530270), (15, 1428252), (18, 1190210), (20, 1071189), (21, 1020180), (28, 765135), (30, 714126), (35, 612108), (36, 595105), (42, 510090), (45, 476084), (49, 437220), (60, 357063), (63, 340060), (70, 306054), (84, 255045), (90, 238042), (98, 218610), (105, 204036), (126, 170030), (140, 153027), (147, 145740), (180, 119021), (196, 109305), (210, 102018), (245, 87444), (252, 85015), (294, 72870), (315, 68012), (343, 62460), (347, 61740), (420, 51009), (441, 48580), (490, 43722), (588, 36435), (630, 34006), (686, 31230), (694, 30870), (735, 29148), (882, 24290), (980, 21861), (1029, 20820), (1041, 20580), (1260, 17003), (1372, 15615), (1388, 15435), (1470, 14574), (1715, 12492), (1735, 12348), (1764, 12145), (2058, 10410), (2082, 10290), (2205, 9716), (2429, 8820), (2940, 7287), (3087, 6940), (3123, 6860), (3430, 6246), (3470, 6174), (4116, 5205), (4164, 5145), (4410, 4858)]