20900625

素因数分解:

$3^1\times 5^4\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:251

約数の個数: 40

約数和(自身を含む): 35538624

約数和(自身を除く): 14637999

約数列:

[1, 3, 5, 15, 25, 71, 75, 125, 157, 213, 355, 375, 471, 625, 785, 1065, 1775, 1875, 2355, 3925, 5325, 8875, 11147, 11775, 19625, 26625, 33441, 44375, 55735, 58875, 98125, 133125, 167205, 278675, 294375, 836025, 1393375, 4180125, 6966875, 20900625]

約数ペア:

[(1, 20900625), (3, 6966875), (5, 4180125), (15, 1393375), (25, 836025), (71, 294375), (75, 278675), (125, 167205), (157, 133125), (213, 98125), (355, 58875), (375, 55735), (471, 44375), (625, 33441), (785, 26625), (1065, 19625), (1775, 11775), (1875, 11147), (2355, 8875), (3925, 5325)]