28221880

素因数分解:

$2^3\times 5^1\times {\mathrm{431}}^1\times {\mathrm{1637}}^1$

素因数の和:2079

約数の個数: 32

約数和(自身を含む): 63685440

約数和(自身を除く): 35463560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 431, 862, 1637, 1724, 2155, 3274, 3448, 4310, 6548, 8185, 8620, 13096, 16370, 17240, 32740, 65480, 705547, 1411094, 2822188, 3527735, 5644376, 7055470, 14110940, 28221880]

約数ペア:

[(1, 28221880), (2, 14110940), (4, 7055470), (5, 5644376), (8, 3527735), (10, 2822188), (20, 1411094), (40, 705547), (431, 65480), (862, 32740), (1637, 17240), (1724, 16370), (2155, 13096), (3274, 8620), (3448, 8185), (4310, 6548)]