28641580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{1289}}^1$

素因数の和:1410

約数の個数: 48

約数和(自身を含む): 66316320

約数和(自身を除く): 37674740

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 101, 110, 202, 220, 404, 505, 1010, 1111, 1289, 2020, 2222, 2578, 4444, 5156, 5555, 6445, 11110, 12890, 14179, 22220, 25780, 28358, 56716, 70895, 130189, 141790, 260378, 283580, 520756, 650945, 1301890, 1432079, 2603780, 2864158, 5728316, 7160395, 14320790, 28641580]

約数ペア:

[(1, 28641580), (2, 14320790), (4, 7160395), (5, 5728316), (10, 2864158), (11, 2603780), (20, 1432079), (22, 1301890), (44, 650945), (55, 520756), (101, 283580), (110, 260378), (202, 141790), (220, 130189), (404, 70895), (505, 56716), (1010, 28358), (1111, 25780), (1289, 22220), (2020, 14179), (2222, 12890), (2578, 11110), (4444, 6445), (5156, 5555)]