20999817

素因数分解:

$3^5\times {\mathrm{89}}^1\times {\mathrm{971}}^1$

素因数の和:1075

約数の個数: 24

約数和(自身を含む): 31842720

約数和(自身を除く): 10842903

約数列:

[1, 3, 9, 27, 81, 89, 243, 267, 801, 971, 2403, 2913, 7209, 8739, 21627, 26217, 78651, 86419, 235953, 259257, 777771, 2333313, 6999939, 20999817]

約数ペア:

[(1, 20999817), (3, 6999939), (9, 2333313), (27, 777771), (81, 259257), (89, 235953), (243, 86419), (267, 78651), (801, 26217), (971, 21627), (2403, 8739), (2913, 7209)]