21871250

素因数分解:

$2^1\times 5^4\times {\mathrm{17497}}^1$

素因数の和:17519

約数の個数: 20

約数和(自身を含む): 40997814

約数和(自身を除く): 19126564

約数列:

[1, 2, 5, 10, 25, 50, 125, 250, 625, 1250, 17497, 34994, 87485, 174970, 437425, 874850, 2187125, 4374250, 10935625, 21871250]

約数ペア:

[(1, 21871250), (2, 10935625), (5, 4374250), (10, 2187125), (25, 874850), (50, 437425), (125, 174970), (250, 87485), (625, 34994), (1250, 17497)]