21581508

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{3739}}^1$

素因数の和:3796

約数の個数: 48

約数和(自身を含む): 55711040

約数和(自身を除く): 34129532

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 37, 39, 52, 74, 78, 111, 148, 156, 222, 444, 481, 962, 1443, 1924, 2886, 3739, 5772, 7478, 11217, 14956, 22434, 44868, 48607, 97214, 138343, 145821, 194428, 276686, 291642, 415029, 553372, 583284, 830058, 1660116, 1798459, 3596918, 5395377, 7193836, 10790754, 21581508]

約数ペア:

[(1, 21581508), (2, 10790754), (3, 7193836), (4, 5395377), (6, 3596918), (12, 1798459), (13, 1660116), (26, 830058), (37, 583284), (39, 553372), (52, 415029), (74, 291642), (78, 276686), (111, 194428), (148, 145821), (156, 138343), (222, 97214), (444, 48607), (481, 44868), (962, 22434), (1443, 14956), (1924, 11217), (2886, 7478), (3739, 5772)]