21280250

素因数分解:

$2^1\times 5^3\times {\mathrm{85121}}^1$

素因数の和:85138

約数の個数: 16

約数和(自身を含む): 39837096

約数和(自身を除く): 18556846

約数列:

[1, 2, 5, 10, 25, 50, 125, 250, 85121, 170242, 425605, 851210, 2128025, 4256050, 10640125, 21280250]

約数ペア:

[(1, 21280250), (2, 10640125), (5, 4256050), (10, 2128025), (25, 851210), (50, 425605), (125, 170242), (250, 85121)]