21684065

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{271}}^1\times {\mathrm{1231}}^1$

素因数の和:1520

約数の個数: 16

約数和(自身を含む): 28148736

約数和(自身を除く): 6464671

約数列:

[1, 5, 13, 65, 271, 1231, 1355, 3523, 6155, 16003, 17615, 80015, 333601, 1668005, 4336813, 21684065]

約数ペア:

[(1, 21684065), (5, 4336813), (13, 1668005), (65, 333601), (271, 80015), (1231, 17615), (1355, 16003), (3523, 6155)]