21051628

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{571}}^1\times {\mathrm{709}}^1$

素因数の和:1297

約数の個数: 24

約数和(自身を含む): 39799760

約数和(自身を除く): 18748132

約数列:

[1, 2, 4, 13, 26, 52, 571, 709, 1142, 1418, 2284, 2836, 7423, 9217, 14846, 18434, 29692, 36868, 404839, 809678, 1619356, 5262907, 10525814, 21051628]

約数ペア:

[(1, 21051628), (2, 10525814), (4, 5262907), (13, 1619356), (26, 809678), (52, 404839), (571, 36868), (709, 29692), (1142, 18434), (1418, 14846), (2284, 9217), (2836, 7423)]