81185660

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{57173}}^1$

素因数の和:57253

約数の個数: 24

約数和(自身を含む): 172894176

約数和(自身を除く): 91708516

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 57173, 114346, 228692, 285865, 571730, 1143460, 4059283, 8118566, 16237132, 20296415, 40592830, 81185660]

約数ペア:

[(1, 81185660), (2, 40592830), (4, 20296415), (5, 16237132), (10, 8118566), (20, 4059283), (71, 1143460), (142, 571730), (284, 285865), (355, 228692), (710, 114346), (1420, 57173)]