20001250

素因数分解:

$2^1\times 5^4\times {\mathrm{16001}}^1$

素因数の和:16023

約数の個数: 20

約数和(自身を含む): 37492686

約数和(自身を除く): 17491436

約数列:

[1, 2, 5, 10, 25, 50, 125, 250, 625, 1250, 16001, 32002, 80005, 160010, 400025, 800050, 2000125, 4000250, 10000625, 20001250]

約数ペア:

[(1, 20001250), (2, 10000625), (5, 4000250), (10, 2000125), (25, 800050), (50, 400025), (125, 160010), (250, 80005), (625, 32002), (1250, 16001)]