28901720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{17623}}^1$

素因数の和:17675

約数の個数: 32

約数和(自身を含む): 66618720

約数和(自身を除く): 37717000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 17623, 35246, 70492, 88115, 140984, 176230, 352460, 704920, 722543, 1445086, 2890172, 3612715, 5780344, 7225430, 14450860, 28901720]

約数ペア:

[(1, 28901720), (2, 14450860), (4, 7225430), (5, 5780344), (8, 3612715), (10, 2890172), (20, 1445086), (40, 722543), (41, 704920), (82, 352460), (164, 176230), (205, 140984), (328, 88115), (410, 70492), (820, 35246), (1640, 17623)]