21050180

素因数分解:

$2^2\times 5^1\times {\mathrm{809}}^1\times {\mathrm{1301}}^1$

素因数の和:2119

約数の個数: 24

約数和(自身を含む): 44294040

約数和(自身を除く): 23243860

約数列:

[1, 2, 4, 5, 10, 20, 809, 1301, 1618, 2602, 3236, 4045, 5204, 6505, 8090, 13010, 16180, 26020, 1052509, 2105018, 4210036, 5262545, 10525090, 21050180]

約数ペア:

[(1, 21050180), (2, 10525090), (4, 5262545), (5, 4210036), (10, 2105018), (20, 1052509), (809, 26020), (1301, 16180), (1618, 13010), (2602, 8090), (3236, 6505), (4045, 5204)]