20580164

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{101}}^1\times {\mathrm{421}}^1$

素因数の和:548

約数の個数: 36

約数和(自身を含む): 40073964

約数和(自身を除く): 19493800

約数列:

[1, 2, 4, 11, 22, 44, 101, 121, 202, 242, 404, 421, 484, 842, 1111, 1684, 2222, 4444, 4631, 9262, 12221, 18524, 24442, 42521, 48884, 50941, 85042, 101882, 170084, 203764, 467731, 935462, 1870924, 5145041, 10290082, 20580164]

約数ペア:

[(1, 20580164), (2, 10290082), (4, 5145041), (11, 1870924), (22, 935462), (44, 467731), (101, 203764), (121, 170084), (202, 101882), (242, 85042), (404, 50941), (421, 48884), (484, 42521), (842, 24442), (1111, 18524), (1684, 12221), (2222, 9262), (4444, 4631)]