20389257

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{8747}}^1$

素因数の和:8797

約数の個数: 24

約数和(自身を含む): 34572096

約数和(自身を除く): 14182839

約数列:

[1, 3, 7, 9, 21, 37, 63, 111, 259, 333, 777, 2331, 8747, 26241, 61229, 78723, 183687, 323639, 551061, 970917, 2265473, 2912751, 6796419, 20389257]

約数ペア:

[(1, 20389257), (3, 6796419), (7, 2912751), (9, 2265473), (21, 970917), (37, 551061), (63, 323639), (111, 183687), (259, 78723), (333, 61229), (777, 26241), (2331, 8747)]