21049915

素因数分解:

$5^1\times {\mathrm{73}}^1\times {\mathrm{101}}^1\times {\mathrm{571}}^1$

素因数の和:750

約数の個数: 16

約数和(自身を含む): 25904736

約数和(自身を除く): 4854821

約数列:

[1, 5, 73, 101, 365, 505, 571, 2855, 7373, 36865, 41683, 57671, 208415, 288355, 4209983, 21049915]

約数ペア:

[(1, 21049915), (5, 4209983), (73, 288355), (101, 208415), (365, 57671), (505, 41683), (571, 36865), (2855, 7373)]