19810475

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{131}}^1\times {\mathrm{263}}^1$

素因数の和:427

約数の個数: 24

約数和(自身を含む): 25926912

約数和(自身を除く): 6116437

約数列:

[1, 5, 23, 25, 115, 131, 263, 575, 655, 1315, 3013, 3275, 6049, 6575, 15065, 30245, 34453, 75325, 151225, 172265, 792419, 861325, 3962095, 19810475]

約数ペア:

[(1, 19810475), (5, 3962095), (23, 861325), (25, 792419), (115, 172265), (131, 151225), (263, 75325), (575, 34453), (655, 30245), (1315, 15065), (3013, 6575), (3275, 6049)]