19880991

素因数分解:

$3^3\times {\mathrm{13}}^2\times {\mathrm{4357}}^1$

素因数の和:4392

約数の個数: 24

約数和(自身を含む): 31900560

約数和(自身を除く): 12019569

約数列:

[1, 3, 9, 13, 27, 39, 117, 169, 351, 507, 1521, 4357, 4563, 13071, 39213, 56641, 117639, 169923, 509769, 736333, 1529307, 2208999, 6626997, 19880991]

約数ペア:

[(1, 19880991), (3, 6626997), (9, 2208999), (13, 1529307), (27, 736333), (39, 509769), (117, 169923), (169, 117639), (351, 56641), (507, 39213), (1521, 13071), (4357, 4563)]