28257160

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{6481}}^1$

素因数の和:6601

約数の個数: 32

約数和(自身を含む): 64171800

約数和(自身を除く): 35914640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 6481, 12962, 25924, 32405, 51848, 64810, 129620, 259240, 706429, 1412858, 2825716, 3532145, 5651432, 7064290, 14128580, 28257160]

約数ペア:

[(1, 28257160), (2, 14128580), (4, 7064290), (5, 5651432), (8, 3532145), (10, 2825716), (20, 1412858), (40, 706429), (109, 259240), (218, 129620), (436, 64810), (545, 51848), (872, 32405), (1090, 25924), (2180, 12962), (4360, 6481)]