21568491

素因数分解:

$3^3\times 7^1\times {\mathrm{139}}^1\times {\mathrm{821}}^1$

素因数の和:976

約数の個数: 32

約数和(自身を含む): 36825600

約数和(自身を除く): 15257109

約数列:

[1, 3, 7, 9, 21, 27, 63, 139, 189, 417, 821, 973, 1251, 2463, 2919, 3753, 5747, 7389, 8757, 17241, 22167, 26271, 51723, 114119, 155169, 342357, 798833, 1027071, 2396499, 3081213, 7189497, 21568491]

約数ペア:

[(1, 21568491), (3, 7189497), (7, 3081213), (9, 2396499), (21, 1027071), (27, 798833), (63, 342357), (139, 155169), (189, 114119), (417, 51723), (821, 26271), (973, 22167), (1251, 17241), (2463, 8757), (2919, 7389), (3753, 5747)]