128412920

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{40637}}^1$

素因数の和:40727

約数の個数: 32

約数和(自身を含む): 292593600

約数和(自身を除く): 164180680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 40637, 81274, 162548, 203185, 325096, 406370, 812740, 1625480, 3210323, 6420646, 12841292, 16051615, 25682584, 32103230, 64206460, 128412920]

約数ペア:

[(1, 128412920), (2, 64206460), (4, 32103230), (5, 25682584), (8, 16051615), (10, 12841292), (20, 6420646), (40, 3210323), (79, 1625480), (158, 812740), (316, 406370), (395, 325096), (632, 203185), (790, 162548), (1580, 81274), (3160, 40637)]