21172910

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{2711}}^1$

素因数の和:2800

約数の個数: 32

約数和(自身を含む): 42177024

約数和(自身を除く): 21004114

約数列:

[1, 2, 5, 10, 11, 22, 55, 71, 110, 142, 355, 710, 781, 1562, 2711, 3905, 5422, 7810, 13555, 27110, 29821, 59642, 149105, 192481, 298210, 384962, 962405, 1924810, 2117291, 4234582, 10586455, 21172910]

約数ペア:

[(1, 21172910), (2, 10586455), (5, 4234582), (10, 2117291), (11, 1924810), (22, 962405), (55, 384962), (71, 298210), (110, 192481), (142, 149105), (355, 59642), (710, 29821), (781, 27110), (1562, 13555), (2711, 7810), (3905, 5422)]