81065680

素因数分解:

$2^4\times 5^1\times {\mathrm{1013321}}^1$

素因数の和:1013334

約数の個数: 20

約数和(自身を含む): 188477892

約数和(自身を除く): 107412212

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1013321, 2026642, 4053284, 5066605, 8106568, 10133210, 16213136, 20266420, 40532840, 81065680]

約数ペア:

[(1, 81065680), (2, 40532840), (4, 20266420), (5, 16213136), (8, 10133210), (10, 8106568), (16, 5066605), (20, 4053284), (40, 2026642), (80, 1013321)]