20989060

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{19801}}^1$

素因数の和:19863

約数の個数: 24

約数和(自身を含む): 44910936

約数和(自身を除く): 23921876

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 19801, 39602, 79204, 99005, 198010, 396020, 1049453, 2098906, 4197812, 5247265, 10494530, 20989060]

約数ペア:

[(1, 20989060), (2, 10494530), (4, 5247265), (5, 4197812), (10, 2098906), (20, 1049453), (53, 396020), (106, 198010), (212, 99005), (265, 79204), (530, 39602), (1060, 19801)]