20900125

素因数分解:

$5^3\times {\mathrm{61}}^1\times {\mathrm{2741}}^1$

素因数の和:2817

約数の個数: 16

約数和(自身を含む): 26520624

約数和(自身を除く): 5620499

約数列:

[1, 5, 25, 61, 125, 305, 1525, 2741, 7625, 13705, 68525, 167201, 342625, 836005, 4180025, 20900125]

約数ペア:

[(1, 20900125), (5, 4180025), (25, 836005), (61, 342625), (125, 167201), (305, 68525), (1525, 13705), (2741, 7625)]