20112880

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3541}}^1$

素因数の和:3625

約数の個数: 40

約数和(自身を含む): 47434464

約数和(自身を除く): 27321584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3541, 5680, 7082, 14164, 17705, 28328, 35410, 56656, 70820, 141640, 251411, 283280, 502822, 1005644, 1257055, 2011288, 2514110, 4022576, 5028220, 10056440, 20112880]

約数ペア:

[(1, 20112880), (2, 10056440), (4, 5028220), (5, 4022576), (8, 2514110), (10, 2011288), (16, 1257055), (20, 1005644), (40, 502822), (71, 283280), (80, 251411), (142, 141640), (284, 70820), (355, 56656), (568, 35410), (710, 28328), (1136, 17705), (1420, 14164), (2840, 7082), (3541, 5680)]