20912829

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1\times {\mathrm{227}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 33094656

約数和(自身を除く): 12181827

約数列:

[1, 3, 7, 21, 41, 107, 123, 227, 287, 321, 681, 749, 861, 1589, 2247, 4387, 4767, 9307, 13161, 24289, 27921, 30709, 65149, 72867, 92127, 170023, 195447, 510069, 995849, 2987547, 6970943, 20912829]

約数ペア:

[(1, 20912829), (3, 6970943), (7, 2987547), (21, 995849), (41, 510069), (107, 195447), (123, 170023), (227, 92127), (287, 72867), (321, 65149), (681, 30709), (749, 27921), (861, 24289), (1589, 13161), (2247, 9307), (4387, 4767)]