20409980

素因数分解:

$2^2\times 5^1\times {\mathrm{829}}^1\times {\mathrm{1231}}^1$

素因数の和:2069

約数の個数: 24

約数和(自身を含む): 42947520

約数和(自身を除く): 22537540

約数列:

[1, 2, 4, 5, 10, 20, 829, 1231, 1658, 2462, 3316, 4145, 4924, 6155, 8290, 12310, 16580, 24620, 1020499, 2040998, 4081996, 5102495, 10204990, 20409980]

約数ペア:

[(1, 20409980), (2, 10204990), (4, 5102495), (5, 4081996), (10, 2040998), (20, 1020499), (829, 24620), (1231, 16580), (1658, 12310), (2462, 8290), (3316, 6155), (4145, 4924)]