18988240

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3343}}^1$

素因数の和:3427

約数の個数: 40

約数和(自身を含む): 44782848

約数和(自身を除く): 25794608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3343, 5680, 6686, 13372, 16715, 26744, 33430, 53488, 66860, 133720, 237353, 267440, 474706, 949412, 1186765, 1898824, 2373530, 3797648, 4747060, 9494120, 18988240]

約数ペア:

[(1, 18988240), (2, 9494120), (4, 4747060), (5, 3797648), (8, 2373530), (10, 1898824), (16, 1186765), (20, 949412), (40, 474706), (71, 267440), (80, 237353), (142, 133720), (284, 66860), (355, 53488), (568, 33430), (710, 26744), (1136, 16715), (1420, 13372), (2840, 6686), (3343, 5680)]