78911660

素因数分解:

$2^2\times 5^1\times {\mathrm{1907}}^1\times {\mathrm{2069}}^1$

素因数の和:3985

約数の個数: 24

約数和(自身を含む): 165881520

約数和(自身を除く): 86969860

約数列:

[1, 2, 4, 5, 10, 20, 1907, 2069, 3814, 4138, 7628, 8276, 9535, 10345, 19070, 20690, 38140, 41380, 3945583, 7891166, 15782332, 19727915, 39455830, 78911660]

約数ペア:

[(1, 78911660), (2, 39455830), (4, 19727915), (5, 15782332), (10, 7891166), (20, 3945583), (1907, 41380), (2069, 38140), (3814, 20690), (4138, 19070), (7628, 10345), (8276, 9535)]