21386950

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{2531}}^1$

素因数の和:2569

約数の個数: 36

約数和(自身を含む): 43092108

約数和(自身を除く): 21705158

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 169, 325, 338, 650, 845, 1690, 2531, 4225, 5062, 8450, 12655, 25310, 32903, 63275, 65806, 126550, 164515, 329030, 427739, 822575, 855478, 1645150, 2138695, 4277390, 10693475, 21386950]

約数ペア:

[(1, 21386950), (2, 10693475), (5, 4277390), (10, 2138695), (13, 1645150), (25, 855478), (26, 822575), (50, 427739), (65, 329030), (130, 164515), (169, 126550), (325, 65806), (338, 63275), (650, 32903), (845, 25310), (1690, 12655), (2531, 8450), (4225, 5062)]