20640410

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4153}}^1$

素因数の和:4238

約数の個数: 32

約数和(自身を含む): 43068672

約数和(自身を除く): 22428262

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 71, 142, 355, 497, 710, 994, 2485, 4153, 4970, 8306, 20765, 29071, 41530, 58142, 145355, 290710, 294863, 589726, 1474315, 2064041, 2948630, 4128082, 10320205, 20640410]

約数ペア:

[(1, 20640410), (2, 10320205), (5, 4128082), (7, 2948630), (10, 2064041), (14, 1474315), (35, 589726), (70, 294863), (71, 290710), (142, 145355), (355, 58142), (497, 41530), (710, 29071), (994, 20765), (2485, 8306), (4153, 4970)]