21804783

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:224

約数の個数: 64

約数和(自身を含む): 40061952

約数和(自身を除く): 18257169

約数列:

[1, 3, 7, 11, 13, 21, 33, 39, 53, 77, 91, 137, 143, 159, 231, 273, 371, 411, 429, 583, 689, 959, 1001, 1113, 1507, 1749, 1781, 2067, 2877, 3003, 4081, 4521, 4823, 5343, 7261, 7579, 10549, 12243, 12467, 14469, 19591, 21783, 22737, 31647, 37401, 50827, 53053, 58773, 79871, 94393, 137137, 152481, 159159, 239613, 283179, 411411, 559097, 660751, 1038323, 1677291, 1982253, 3114969, 7268261, 21804783]

約数ペア:

[(1, 21804783), (3, 7268261), (7, 3114969), (11, 1982253), (13, 1677291), (21, 1038323), (33, 660751), (39, 559097), (53, 411411), (77, 283179), (91, 239613), (137, 159159), (143, 152481), (159, 137137), (231, 94393), (273, 79871), (371, 58773), (411, 53053), (429, 50827), (583, 37401), (689, 31647), (959, 22737), (1001, 21783), (1113, 19591), (1507, 14469), (1749, 12467), (1781, 12243), (2067, 10549), (2877, 7579), (3003, 7261), (4081, 5343), (4521, 4823)]