21651250

素因数分解:

$2^1\times 5^4\times {\mathrm{17321}}^1$

素因数の和:17343

約数の個数: 20

約数和(自身を含む): 40585446

約数和(自身を除く): 18934196

約数列:

[1, 2, 5, 10, 25, 50, 125, 250, 625, 1250, 17321, 34642, 86605, 173210, 433025, 866050, 2165125, 4330250, 10825625, 21651250]

約数ペア:

[(1, 21651250), (2, 10825625), (5, 4330250), (10, 2165125), (25, 866050), (50, 433025), (125, 173210), (250, 86605), (625, 34642), (1250, 17321)]