19979840

素因数分解:

$2^6\times 5^1\times {\mathrm{29}}^1\times {\mathrm{2153}}^1$

素因数の和:2199

約数の個数: 56

約数和(自身を含む): 49240440

約数和(自身を除く): 29260600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 145, 160, 232, 290, 320, 464, 580, 928, 1160, 1856, 2153, 2320, 4306, 4640, 8612, 9280, 10765, 17224, 21530, 34448, 43060, 62437, 68896, 86120, 124874, 137792, 172240, 249748, 312185, 344480, 499496, 624370, 688960, 998992, 1248740, 1997984, 2497480, 3995968, 4994960, 9989920, 19979840]

約数ペア:

[(1, 19979840), (2, 9989920), (4, 4994960), (5, 3995968), (8, 2497480), (10, 1997984), (16, 1248740), (20, 998992), (29, 688960), (32, 624370), (40, 499496), (58, 344480), (64, 312185), (80, 249748), (116, 172240), (145, 137792), (160, 124874), (232, 86120), (290, 68896), (320, 62437), (464, 43060), (580, 34448), (928, 21530), (1160, 17224), (1856, 10765), (2153, 9280), (2320, 8612), (4306, 4640)]