20909145

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{677}}^1$

素因数の和:785

約数の個数: 32

約数和(自身を含む): 35147520

約数和(自身を除く): 14238375

約数列:

[1, 3, 5, 15, 29, 71, 87, 145, 213, 355, 435, 677, 1065, 2031, 2059, 3385, 6177, 10155, 10295, 19633, 30885, 48067, 58899, 98165, 144201, 240335, 294495, 721005, 1393943, 4181829, 6969715, 20909145]

約数ペア:

[(1, 20909145), (3, 6969715), (5, 4181829), (15, 1393943), (29, 721005), (71, 294495), (87, 240335), (145, 144201), (213, 98165), (355, 58899), (435, 48067), (677, 30885), (1065, 19633), (2031, 10295), (2059, 10155), (3385, 6177)]