20810331

素因数分解:

$3^3\times {\mathrm{23}}^2\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:133

約数の個数: 48

約数和(自身を含む): 33976320

約数和(自身を除く): 13165989

約数列:

[1, 3, 9, 23, 27, 31, 47, 69, 93, 141, 207, 279, 423, 529, 621, 713, 837, 1081, 1269, 1457, 1587, 2139, 3243, 4371, 4761, 6417, 9729, 13113, 14283, 16399, 19251, 24863, 29187, 33511, 39339, 49197, 74589, 100533, 147591, 223767, 301599, 442773, 671301, 770753, 904797, 2312259, 6936777, 20810331]

約数ペア:

[(1, 20810331), (3, 6936777), (9, 2312259), (23, 904797), (27, 770753), (31, 671301), (47, 442773), (69, 301599), (93, 223767), (141, 147591), (207, 100533), (279, 74589), (423, 49197), (529, 39339), (621, 33511), (713, 29187), (837, 24863), (1081, 19251), (1269, 16399), (1457, 14283), (1587, 13113), (2139, 9729), (3243, 6417), (4371, 4761)]