28908220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{1301}}^1$

素因数の和:1422

約数の個数: 48

約数和(自身を含む): 66933216

約数和(自身を除く): 38024996

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 101, 110, 202, 220, 404, 505, 1010, 1111, 1301, 2020, 2222, 2602, 4444, 5204, 5555, 6505, 11110, 13010, 14311, 22220, 26020, 28622, 57244, 71555, 131401, 143110, 262802, 286220, 525604, 657005, 1314010, 1445411, 2628020, 2890822, 5781644, 7227055, 14454110, 28908220]

約数ペア:

[(1, 28908220), (2, 14454110), (4, 7227055), (5, 5781644), (10, 2890822), (11, 2628020), (20, 1445411), (22, 1314010), (44, 657005), (55, 525604), (101, 286220), (110, 262802), (202, 143110), (220, 131401), (404, 71555), (505, 57244), (1010, 28622), (1111, 26020), (1301, 22220), (2020, 14311), (2222, 13010), (2602, 11110), (4444, 6505), (5204, 5555)]