654620

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{461}}^1$

素因数の和:541

約数の個数: 24

約数和(自身を含む): 1397088

約数和(自身を除く): 742468

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 461, 710, 922, 1420, 1844, 2305, 4610, 9220, 32731, 65462, 130924, 163655, 327310, 654620]

約数ペア:

[(1, 654620), (2, 327310), (4, 163655), (5, 130924), (10, 65462), (20, 32731), (71, 9220), (142, 4610), (284, 2305), (355, 1844), (461, 1420), (710, 922)]