20985460

素因数分解:

$2^2\times 5^1\times {\mathrm{809}}^1\times {\mathrm{1297}}^1$

素因数の和:2115

約数の個数: 24

約数和(自身を含む): 44157960

約数和(自身を除く): 23172500

約数列:

[1, 2, 4, 5, 10, 20, 809, 1297, 1618, 2594, 3236, 4045, 5188, 6485, 8090, 12970, 16180, 25940, 1049273, 2098546, 4197092, 5246365, 10492730, 20985460]

約数ペア:

[(1, 20985460), (2, 10492730), (4, 5246365), (5, 4197092), (10, 2098546), (20, 1049273), (809, 25940), (1297, 16180), (1618, 12970), (2594, 8090), (3236, 6485), (4045, 5188)]