245660

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{173}}^1$

素因数の和:253

約数の個数: 24

約数和(自身を含む): 526176

約数和(自身を除く): 280516

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 173, 284, 346, 355, 692, 710, 865, 1420, 1730, 3460, 12283, 24566, 49132, 61415, 122830, 245660]

約数ペア:

[(1, 245660), (2, 122830), (4, 61415), (5, 49132), (10, 24566), (20, 12283), (71, 3460), (142, 1730), (173, 1420), (284, 865), (346, 710), (355, 692)]