28661780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{2027}}^1$

素因数の和:2144

約数の個数: 48

約数和(自身を含む): 69503616

約数和(自身を除く): 40841836

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 101, 140, 202, 404, 505, 707, 1010, 1414, 2020, 2027, 2828, 3535, 4054, 7070, 8108, 10135, 14140, 14189, 20270, 28378, 40540, 56756, 70945, 141890, 204727, 283780, 409454, 818908, 1023635, 1433089, 2047270, 2866178, 4094540, 5732356, 7165445, 14330890, 28661780]

約数ペア:

[(1, 28661780), (2, 14330890), (4, 7165445), (5, 5732356), (7, 4094540), (10, 2866178), (14, 2047270), (20, 1433089), (28, 1023635), (35, 818908), (70, 409454), (101, 283780), (140, 204727), (202, 141890), (404, 70945), (505, 56756), (707, 40540), (1010, 28378), (1414, 20270), (2020, 14189), (2027, 14140), (2828, 10135), (3535, 8108), (4054, 7070)]