820877180

素因数分解:

$2^2\times 5^1\times {\mathrm{521}}^1\times {\mathrm{78779}}^1$

素因数の和:79309

約数の個数: 24

約数和(自身を含む): 1727172720

約数和(自身を除く): 906295540

約数列:

[1, 2, 4, 5, 10, 20, 521, 1042, 2084, 2605, 5210, 10420, 78779, 157558, 315116, 393895, 787790, 1575580, 41043859, 82087718, 164175436, 205219295, 410438590, 820877180]

約数ペア:

[(1, 820877180), (2, 410438590), (4, 205219295), (5, 164175436), (10, 82087718), (20, 41043859), (521, 1575580), (1042, 787790), (2084, 393895), (2605, 315116), (5210, 157558), (10420, 78779)]