20591775

素因数分解:

$3^2\times 5^2\times {\mathrm{71}}^1\times {\mathrm{1289}}^1$

素因数の和:1376

約数の個数: 36

約数和(自身を含む): 37430640

約数和(自身を除く): 16838865

約数列:

[1, 3, 5, 9, 15, 25, 45, 71, 75, 213, 225, 355, 639, 1065, 1289, 1775, 3195, 3867, 5325, 6445, 11601, 15975, 19335, 32225, 58005, 91519, 96675, 274557, 290025, 457595, 823671, 1372785, 2287975, 4118355, 6863925, 20591775]

約数ペア:

[(1, 20591775), (3, 6863925), (5, 4118355), (9, 2287975), (15, 1372785), (25, 823671), (45, 457595), (71, 290025), (75, 274557), (213, 96675), (225, 91519), (355, 58005), (639, 32225), (1065, 19335), (1289, 15975), (1775, 11601), (3195, 6445), (3867, 5325)]