20900975

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{181}}^1$

素因数の和:371

約数の個数: 24

約数和(自身を含む): 27081600

約数和(自身を除く): 6180625

約数列:

[1, 5, 25, 31, 149, 155, 181, 745, 775, 905, 3725, 4525, 4619, 5611, 23095, 26969, 28055, 115475, 134845, 140275, 674225, 836039, 4180195, 20900975]

約数ペア:

[(1, 20900975), (5, 4180195), (25, 836039), (31, 674225), (149, 140275), (155, 134845), (181, 115475), (745, 28055), (775, 26969), (905, 23095), (3725, 5611), (4525, 4619)]