20156245

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{331}}^1\times {\mathrm{641}}^1$

素因数の和:996

約数の個数: 16

約数和(自身を含む): 25577280

約数和(自身を除く): 5421035

約数列:

[1, 5, 19, 95, 331, 641, 1655, 3205, 6289, 12179, 31445, 60895, 212171, 1060855, 4031249, 20156245]

約数ペア:

[(1, 20156245), (5, 4031249), (19, 1060855), (95, 212171), (331, 60895), (641, 31445), (1655, 12179), (3205, 6289)]