21065380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{167}}^1$

素因数の和:253

約数の個数: 96

約数和(自身を含む): 54867456

約数和(自身を除く): 33802076

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 53, 68, 70, 85, 106, 119, 140, 167, 170, 212, 238, 265, 334, 340, 371, 476, 530, 595, 668, 742, 835, 901, 1060, 1169, 1190, 1484, 1670, 1802, 1855, 2338, 2380, 2839, 3340, 3604, 3710, 4505, 4676, 5678, 5845, 6307, 7420, 8851, 9010, 11356, 11690, 12614, 14195, 17702, 18020, 19873, 23380, 25228, 28390, 31535, 35404, 39746, 44255, 56780, 61957, 63070, 79492, 88510, 99365, 123914, 126140, 150467, 177020, 198730, 247828, 300934, 309785, 397460, 601868, 619570, 752335, 1053269, 1239140, 1504670, 2106538, 3009340, 4213076, 5266345, 10532690, 21065380]

約数ペア:

[(1, 21065380), (2, 10532690), (4, 5266345), (5, 4213076), (7, 3009340), (10, 2106538), (14, 1504670), (17, 1239140), (20, 1053269), (28, 752335), (34, 619570), (35, 601868), (53, 397460), (68, 309785), (70, 300934), (85, 247828), (106, 198730), (119, 177020), (140, 150467), (167, 126140), (170, 123914), (212, 99365), (238, 88510), (265, 79492), (334, 63070), (340, 61957), (371, 56780), (476, 44255), (530, 39746), (595, 35404), (668, 31535), (742, 28390), (835, 25228), (901, 23380), (1060, 19873), (1169, 18020), (1190, 17702), (1484, 14195), (1670, 12614), (1802, 11690), (1855, 11356), (2338, 9010), (2380, 8851), (2839, 7420), (3340, 6307), (3604, 5845), (3710, 5678), (4505, 4676)]