68517640

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{28081}}^1$

素因数の和:28153

約数の個数: 32

約数和(自身を含む): 156697560

約数和(自身を除く): 88179920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 28081, 56162, 112324, 140405, 224648, 280810, 561620, 1123240, 1712941, 3425882, 6851764, 8564705, 13703528, 17129410, 34258820, 68517640]

約数ペア:

[(1, 68517640), (2, 34258820), (4, 17129410), (5, 13703528), (8, 8564705), (10, 6851764), (20, 3425882), (40, 1712941), (61, 1123240), (122, 561620), (244, 280810), (305, 224648), (488, 140405), (610, 112324), (1220, 56162), (2440, 28081)]