21018556

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{5693}}^1$

素因数の和:5781

約数の個数: 24

約数和(自身を含む): 40176864

約数和(自身を除く): 19158308

約数列:

[1, 2, 4, 13, 26, 52, 71, 142, 284, 923, 1846, 3692, 5693, 11386, 22772, 74009, 148018, 296036, 404203, 808406, 1616812, 5254639, 10509278, 21018556]

約数ペア:

[(1, 21018556), (2, 10509278), (4, 5254639), (13, 1616812), (26, 808406), (52, 404203), (71, 296036), (142, 148018), (284, 74009), (923, 22772), (1846, 11386), (3692, 5693)]