181020520

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{17609}}^1$

素因数の和:17877

約数の個数: 32

約数和(自身を含む): 408904200

約数和(自身を除く): 227883680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 2056, 2570, 5140, 10280, 17609, 35218, 70436, 88045, 140872, 176090, 352180, 704360, 4525513, 9051026, 18102052, 22627565, 36204104, 45255130, 90510260, 181020520]

約数ペア:

[(1, 181020520), (2, 90510260), (4, 45255130), (5, 36204104), (8, 22627565), (10, 18102052), (20, 9051026), (40, 4525513), (257, 704360), (514, 352180), (1028, 176090), (1285, 140872), (2056, 88045), (2570, 70436), (5140, 35218), (10280, 17609)]