21852980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13831}}^1$

素因数の和:13919

約数の個数: 24

約数和(自身を含む): 46475520

約数和(自身を除く): 24622540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13831, 27662, 55324, 69155, 138310, 276620, 1092649, 2185298, 4370596, 5463245, 10926490, 21852980]

約数ペア:

[(1, 21852980), (2, 10926490), (4, 5463245), (5, 4370596), (10, 2185298), (20, 1092649), (79, 276620), (158, 138310), (316, 69155), (395, 55324), (790, 27662), (1580, 13831)]