21763640

素因数分解:

$2^3\times 5^1\times {\mathrm{349}}^1\times {\mathrm{1559}}^1$

素因数の和:1919

約数の個数: 32

約数和(自身を含む): 49140000

約数和(自身を除く): 27376360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 349, 698, 1396, 1559, 1745, 2792, 3118, 3490, 6236, 6980, 7795, 12472, 13960, 15590, 31180, 62360, 544091, 1088182, 2176364, 2720455, 4352728, 5440910, 10881820, 21763640]

約数ペア:

[(1, 21763640), (2, 10881820), (4, 5440910), (5, 4352728), (8, 2720455), (10, 2176364), (20, 1088182), (40, 544091), (349, 62360), (698, 31180), (1396, 15590), (1559, 13960), (1745, 12472), (2792, 7795), (3118, 6980), (3490, 6236)]