18972171

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{223}}^1$

素因数の和:392

約数の個数: 32

約数和(自身を含む): 29675520

約数和(自身を除く): 10703349

約数列:

[1, 3, 9, 23, 27, 69, 137, 207, 223, 411, 621, 669, 1233, 2007, 3151, 3699, 5129, 6021, 9453, 15387, 28359, 30551, 46161, 85077, 91653, 138483, 274959, 702673, 824877, 2108019, 6324057, 18972171]

約数ペア:

[(1, 18972171), (3, 6324057), (9, 2108019), (23, 824877), (27, 702673), (69, 274959), (137, 138483), (207, 91653), (223, 85077), (411, 46161), (621, 30551), (669, 28359), (1233, 15387), (2007, 9453), (3151, 6021), (3699, 5129)]