21961420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{84467}}^1$

素因数の和:84489

約数の個数: 24

約数和(自身を含む): 49667184

約数和(自身を除く): 27705764

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 84467, 168934, 337868, 422335, 844670, 1098071, 1689340, 2196142, 4392284, 5490355, 10980710, 21961420]

約数ペア:

[(1, 21961420), (2, 10980710), (4, 5490355), (5, 4392284), (10, 2196142), (13, 1689340), (20, 1098071), (26, 844670), (52, 422335), (65, 337868), (130, 168934), (260, 84467)]