21784580

素因数分解:

$2^2\times 5^1\times {\mathrm{349}}^1\times {\mathrm{3121}}^1$

素因数の和:3479

約数の個数: 24

約数和(自身を含む): 45893400

約数和(自身を除く): 24108820

約数列:

[1, 2, 4, 5, 10, 20, 349, 698, 1396, 1745, 3121, 3490, 6242, 6980, 12484, 15605, 31210, 62420, 1089229, 2178458, 4356916, 5446145, 10892290, 21784580]

約数ペア:

[(1, 21784580), (2, 10892290), (4, 5446145), (5, 4356916), (10, 2178458), (20, 1089229), (349, 62420), (698, 31210), (1396, 15605), (1745, 12484), (3121, 6980), (3490, 6242)]