20106440

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{1229}}^1$

素因数の和:1649

約数の個数: 32

約数和(自身を含む): 45387000

約数和(自身を除く): 25280560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1229, 1636, 2045, 2458, 3272, 4090, 4916, 6145, 8180, 9832, 12290, 16360, 24580, 49160, 502661, 1005322, 2010644, 2513305, 4021288, 5026610, 10053220, 20106440]

約数ペア:

[(1, 20106440), (2, 10053220), (4, 5026610), (5, 4021288), (8, 2513305), (10, 2010644), (20, 1005322), (40, 502661), (409, 49160), (818, 24580), (1229, 16360), (1636, 12290), (2045, 9832), (2458, 8180), (3272, 6145), (4090, 4916)]