28180971

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1811}}^1$

素因数の和:1856

約数の個数: 48

約数和(自身を含む): 52765440

約数和(自身を除く): 24584469

約数列:

[1, 3, 7, 9, 13, 19, 21, 39, 57, 63, 91, 117, 133, 171, 247, 273, 399, 741, 819, 1197, 1729, 1811, 2223, 5187, 5433, 12677, 15561, 16299, 23543, 34409, 38031, 70629, 103227, 114093, 164801, 211887, 240863, 309681, 447317, 494403, 722589, 1341951, 1483209, 2167767, 3131219, 4025853, 9393657, 28180971]

約数ペア:

[(1, 28180971), (3, 9393657), (7, 4025853), (9, 3131219), (13, 2167767), (19, 1483209), (21, 1341951), (39, 722589), (57, 494403), (63, 447317), (91, 309681), (117, 240863), (133, 211887), (171, 164801), (247, 114093), (273, 103227), (399, 70629), (741, 38031), (819, 34409), (1197, 23543), (1729, 16299), (1811, 15561), (2223, 12677), (5187, 5433)]