1986985

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{397}}^1$

素因数の和:433

約数の個数: 32

約数和(自身を含む): 3209472

約数和(自身を除く): 1222487

約数列:

[1, 5, 7, 11, 13, 35, 55, 65, 77, 91, 143, 385, 397, 455, 715, 1001, 1985, 2779, 4367, 5005, 5161, 13895, 21835, 25805, 30569, 36127, 56771, 152845, 180635, 283855, 397397, 1986985]

約数ペア:

[(1, 1986985), (5, 397397), (7, 283855), (11, 180635), (13, 152845), (35, 56771), (55, 36127), (65, 30569), (77, 25805), (91, 21835), (143, 13895), (385, 5161), (397, 5005), (455, 4367), (715, 2779), (1001, 1985)]