20471220

素因数分解:

$2^2\times 3^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{211}}^1$

素因数の和:251

約数の個数: 216

約数和(自身を含む): 79174368

約数和(自身を除く): 58703148

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 14, 15, 18, 20, 21, 22, 28, 30, 33, 35, 36, 42, 44, 45, 49, 55, 60, 63, 66, 70, 77, 84, 90, 98, 99, 105, 110, 126, 132, 140, 147, 154, 165, 180, 196, 198, 210, 211, 220, 231, 245, 252, 294, 308, 315, 330, 385, 396, 420, 422, 441, 462, 490, 495, 539, 588, 630, 633, 660, 693, 735, 770, 844, 882, 924, 980, 990, 1055, 1078, 1155, 1260, 1266, 1386, 1470, 1477, 1540, 1617, 1764, 1899, 1980, 2110, 2156, 2205, 2310, 2321, 2532, 2695, 2772, 2940, 2954, 3165, 3234, 3465, 3798, 4220, 4410, 4431, 4620, 4642, 4851, 5390, 5908, 6330, 6468, 6930, 6963, 7385, 7596, 8085, 8820, 8862, 9284, 9495, 9702, 10339, 10780, 11605, 12660, 13293, 13860, 13926, 14770, 16170, 16247, 17724, 18990, 19404, 20678, 20889, 22155, 23210, 24255, 26586, 27852, 29540, 31017, 32340, 32494, 34815, 37980, 41356, 41778, 44310, 46420, 48510, 48741, 51695, 53172, 62034, 64988, 66465, 69630, 81235, 83556, 88620, 93051, 97020, 97482, 103390, 104445, 113729, 124068, 132930, 139260, 146223, 155085, 162470, 186102, 194964, 206780, 208890, 227458, 243705, 265860, 292446, 310170, 324940, 341187, 372204, 417780, 454916, 465255, 487410, 568645, 584892, 620340, 682374, 731115, 930510, 974820, 1023561, 1137290, 1364748, 1462230, 1705935, 1861020, 2047122, 2274580, 2924460, 3411870, 4094244, 5117805, 6823740, 10235610, 20471220]

約数ペア:

[(1, 20471220), (2, 10235610), (3, 6823740), (4, 5117805), (5, 4094244), (6, 3411870), (7, 2924460), (9, 2274580), (10, 2047122), (11, 1861020), (12, 1705935), (14, 1462230), (15, 1364748), (18, 1137290), (20, 1023561), (21, 974820), (22, 930510), (28, 731115), (30, 682374), (33, 620340), (35, 584892), (36, 568645), (42, 487410), (44, 465255), (45, 454916), (49, 417780), (55, 372204), (60, 341187), (63, 324940), (66, 310170), (70, 292446), (77, 265860), (84, 243705), (90, 227458), (98, 208890), (99, 206780), (105, 194964), (110, 186102), (126, 162470), (132, 155085), (140, 146223), (147, 139260), (154, 132930), (165, 124068), (180, 113729), (196, 104445), (198, 103390), (210, 97482), (211, 97020), (220, 93051), (231, 88620), (245, 83556), (252, 81235), (294, 69630), (308, 66465), (315, 64988), (330, 62034), (385, 53172), (396, 51695), (420, 48741), (422, 48510), (441, 46420), (462, 44310), (490, 41778), (495, 41356), (539, 37980), (588, 34815), (630, 32494), (633, 32340), (660, 31017), (693, 29540), (735, 27852), (770, 26586), (844, 24255), (882, 23210), (924, 22155), (980, 20889), (990, 20678), (1055, 19404), (1078, 18990), (1155, 17724), (1260, 16247), (1266, 16170), (1386, 14770), (1470, 13926), (1477, 13860), (1540, 13293), (1617, 12660), (1764, 11605), (1899, 10780), (1980, 10339), (2110, 9702), (2156, 9495), (2205, 9284), (2310, 8862), (2321, 8820), (2532, 8085), (2695, 7596), (2772, 7385), (2940, 6963), (2954, 6930), (3165, 6468), (3234, 6330), (3465, 5908), (3798, 5390), (4220, 4851), (4410, 4642), (4431, 4620)]