21388510

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{14957}}^1$

素因数の和:14988

約数の個数: 32

約数和(自身を含む): 45232992

約数和(自身を除く): 23844482

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 55, 65, 110, 130, 143, 286, 715, 1430, 14957, 29914, 74785, 149570, 164527, 194441, 329054, 388882, 822635, 972205, 1645270, 1944410, 2138851, 4277702, 10694255, 21388510]

約数ペア:

[(1, 21388510), (2, 10694255), (5, 4277702), (10, 2138851), (11, 1944410), (13, 1645270), (22, 972205), (26, 822635), (55, 388882), (65, 329054), (110, 194441), (130, 164527), (143, 149570), (286, 74785), (715, 29914), (1430, 14957)]