21149995

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{353}}^1\times {\mathrm{521}}^1$

素因数の和:902

約数の個数: 16

約数和(自身を含む): 26609472

約数和(自身を除く): 5459477

約数列:

[1, 5, 23, 115, 353, 521, 1765, 2605, 8119, 11983, 40595, 59915, 183913, 919565, 4229999, 21149995]

約数ペア:

[(1, 21149995), (5, 4229999), (23, 919565), (115, 183913), (353, 59915), (521, 40595), (1765, 11983), (2605, 8119)]