21815290

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{211}}^2$

素因数の和:443

約数の個数: 36

約数和(自身を含む): 45896058

約数和(自身を除く): 24080768

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 211, 245, 422, 490, 1055, 1477, 2110, 2954, 7385, 10339, 14770, 20678, 44521, 51695, 89042, 103390, 222605, 311647, 445210, 623294, 1558235, 2181529, 3116470, 4363058, 10907645, 21815290]

約数ペア:

[(1, 21815290), (2, 10907645), (5, 4363058), (7, 3116470), (10, 2181529), (14, 1558235), (35, 623294), (49, 445210), (70, 311647), (98, 222605), (211, 103390), (245, 89042), (422, 51695), (490, 44521), (1055, 20678), (1477, 14770), (2110, 10339), (2954, 7385)]