18969993

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4241}}^1$

素因数の和:4325

約数の個数: 24

約数和(自身を含む): 31764096

約数和(自身を除く): 12794103

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4241, 4473, 12723, 29687, 38169, 89061, 267183, 301111, 903333, 2107777, 2709999, 6323331, 18969993]

約数ペア:

[(1, 18969993), (3, 6323331), (7, 2709999), (9, 2107777), (21, 903333), (63, 301111), (71, 267183), (213, 89061), (497, 38169), (639, 29687), (1491, 12723), (4241, 4473)]