20187905

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{349}}^1\times {\mathrm{503}}^1$

素因数の和:880

約数の個数: 16

約数和(自身を含む): 25401600

約数和(自身を除く): 5213695

約数列:

[1, 5, 23, 115, 349, 503, 1745, 2515, 8027, 11569, 40135, 57845, 175547, 877735, 4037581, 20187905]

約数ペア:

[(1, 20187905), (5, 4037581), (23, 877735), (115, 175547), (349, 57845), (503, 40135), (1745, 11569), (2515, 8027)]