21890427

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{571}}^1\times {\mathrm{983}}^1$

素因数の和:1570

約数の個数: 16

約数和(自身を含む): 31519488

約数和(自身を除く): 9629061

約数列:

[1, 3, 13, 39, 571, 983, 1713, 2949, 7423, 12779, 22269, 38337, 561293, 1683879, 7296809, 21890427]

約数ペア:

[(1, 21890427), (3, 7296809), (13, 1683879), (39, 561293), (571, 38337), (983, 22269), (1713, 12779), (2949, 7423)]