177980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{809}}^1$

素因数の和:829

約数の個数: 24

約数和(自身を含む): 408240

約数和(自身を除く): 230260

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 809, 1618, 3236, 4045, 8090, 8899, 16180, 17798, 35596, 44495, 88990, 177980]

約数ペア:

[(1, 177980), (2, 88990), (4, 44495), (5, 35596), (10, 17798), (11, 16180), (20, 8899), (22, 8090), (44, 4045), (55, 3236), (110, 1618), (220, 809)]