20254395

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1621}}^1$

素因数の和:1660

約数の個数: 48

約数和(自身を含む): 39940128

約数和(自身を除く): 19685733

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 49, 51, 85, 105, 119, 147, 245, 255, 357, 595, 735, 833, 1621, 1785, 2499, 4165, 4863, 8105, 11347, 12495, 24315, 27557, 34041, 56735, 79429, 82671, 137785, 170205, 192899, 238287, 397145, 413355, 578697, 964495, 1191435, 1350293, 2893485, 4050879, 6751465, 20254395]

約数ペア:

[(1, 20254395), (3, 6751465), (5, 4050879), (7, 2893485), (15, 1350293), (17, 1191435), (21, 964495), (35, 578697), (49, 413355), (51, 397145), (85, 238287), (105, 192899), (119, 170205), (147, 137785), (245, 82671), (255, 79429), (357, 56735), (595, 34041), (735, 27557), (833, 24315), (1621, 12495), (1785, 11347), (2499, 8105), (4165, 4863)]