21711250

素因数分解:

$2^1\times 5^4\times {\mathrm{11}}^1\times {\mathrm{1579}}^1$

素因数の和:1612

約数の個数: 40

約数和(自身を含む): 44423280

約数和(自身を除く): 22712030

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 125, 250, 275, 550, 625, 1250, 1375, 1579, 2750, 3158, 6875, 7895, 13750, 15790, 17369, 34738, 39475, 78950, 86845, 173690, 197375, 394750, 434225, 868450, 986875, 1973750, 2171125, 4342250, 10855625, 21711250]

約数ペア:

[(1, 21711250), (2, 10855625), (5, 4342250), (10, 2171125), (11, 1973750), (22, 986875), (25, 868450), (50, 434225), (55, 394750), (110, 197375), (125, 173690), (250, 86845), (275, 78950), (550, 39475), (625, 34738), (1250, 17369), (1375, 15790), (1579, 13750), (2750, 7895), (3158, 6875)]