21731589

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 36201984

約数和(自身を除く): 14470395

約数列:

[1, 3, 9, 11, 31, 33, 73, 93, 97, 99, 219, 279, 291, 341, 657, 803, 873, 1023, 1067, 2263, 2409, 3007, 3069, 3201, 6789, 7081, 7227, 9021, 9603, 20367, 21243, 24893, 27063, 33077, 63729, 74679, 77891, 99231, 219511, 224037, 233673, 297693, 658533, 701019, 1975599, 2414621, 7243863, 21731589]

約数ペア:

[(1, 21731589), (3, 7243863), (9, 2414621), (11, 1975599), (31, 701019), (33, 658533), (73, 297693), (93, 233673), (97, 224037), (99, 219511), (219, 99231), (279, 77891), (291, 74679), (341, 63729), (657, 33077), (803, 27063), (873, 24893), (1023, 21243), (1067, 20367), (2263, 9603), (2409, 9021), (3007, 7227), (3069, 7081), (3201, 6789)]