21557710

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{197}}^1\times {\mathrm{353}}^1$

素因数の和:588

約数の個数: 32

約数和(自身を含む): 40372992

約数和(自身を除く): 18815282

約数列:

[1, 2, 5, 10, 31, 62, 155, 197, 310, 353, 394, 706, 985, 1765, 1970, 3530, 6107, 10943, 12214, 21886, 30535, 54715, 61070, 69541, 109430, 139082, 347705, 695410, 2155771, 4311542, 10778855, 21557710]

約数ペア:

[(1, 21557710), (2, 10778855), (5, 4311542), (10, 2155771), (31, 695410), (62, 347705), (155, 139082), (197, 109430), (310, 69541), (353, 61070), (394, 54715), (706, 30535), (985, 21886), (1765, 12214), (1970, 10943), (3530, 6107)]