20781957

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{24137}}^1$

素因数の和:24188

約数の個数: 16

約数和(自身を含む): 32441472

約数和(自身を除く): 11659515

約数列:

[1, 3, 7, 21, 41, 123, 287, 861, 24137, 72411, 168959, 506877, 989617, 2968851, 6927319, 20781957]

約数ペア:

[(1, 20781957), (3, 6927319), (7, 2968851), (21, 989617), (41, 506877), (123, 168959), (287, 72411), (861, 24137)]