201580520

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{19609}}^1$

素因数の和:19877

約数の個数: 32

約数和(自身を含む): 455344200

約数和(自身を除く): 253763680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 2056, 2570, 5140, 10280, 19609, 39218, 78436, 98045, 156872, 196090, 392180, 784360, 5039513, 10079026, 20158052, 25197565, 40316104, 50395130, 100790260, 201580520]

約数ペア:

[(1, 201580520), (2, 100790260), (4, 50395130), (5, 40316104), (8, 25197565), (10, 20158052), (20, 10079026), (40, 5039513), (257, 784360), (514, 392180), (1028, 196090), (1285, 156872), (2056, 98045), (2570, 78436), (5140, 39218), (10280, 19609)]