1390180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:180

約数の個数: 48

約数和(自身を含む): 3265920

約数和(自身を除く): 1875740

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 89, 110, 142, 178, 220, 284, 355, 356, 445, 710, 781, 890, 979, 1420, 1562, 1780, 1958, 3124, 3905, 3916, 4895, 6319, 7810, 9790, 12638, 15620, 19580, 25276, 31595, 63190, 69509, 126380, 139018, 278036, 347545, 695090, 1390180]

約数ペア:

[(1, 1390180), (2, 695090), (4, 347545), (5, 278036), (10, 139018), (11, 126380), (20, 69509), (22, 63190), (44, 31595), (55, 25276), (71, 19580), (89, 15620), (110, 12638), (142, 9790), (178, 7810), (220, 6319), (284, 4895), (355, 3916), (356, 3905), (445, 3124), (710, 1958), (781, 1780), (890, 1562), (979, 1420)]