20758960

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{5521}}^1$

素因数の和:5581

約数の個数: 40

約数和(自身を含む): 49300416

約数和(自身を除く): 28541456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 80, 94, 188, 235, 376, 470, 752, 940, 1880, 3760, 5521, 11042, 22084, 27605, 44168, 55210, 88336, 110420, 220840, 259487, 441680, 518974, 1037948, 1297435, 2075896, 2594870, 4151792, 5189740, 10379480, 20758960]

約数ペア:

[(1, 20758960), (2, 10379480), (4, 5189740), (5, 4151792), (8, 2594870), (10, 2075896), (16, 1297435), (20, 1037948), (40, 518974), (47, 441680), (80, 259487), (94, 220840), (188, 110420), (235, 88336), (376, 55210), (470, 44168), (752, 27605), (940, 22084), (1880, 11042), (3760, 5521)]