21456910

素因数分解:

$2^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{643}}^1$

素因数の和:768

約数の個数: 32

約数和(自身を含む): 40061952

約数和(自身を除く): 18605042

約数列:

[1, 2, 5, 10, 47, 71, 94, 142, 235, 355, 470, 643, 710, 1286, 3215, 3337, 6430, 6674, 16685, 30221, 33370, 45653, 60442, 91306, 151105, 228265, 302210, 456530, 2145691, 4291382, 10728455, 21456910]

約数ペア:

[(1, 21456910), (2, 10728455), (5, 4291382), (10, 2145691), (47, 456530), (71, 302210), (94, 228265), (142, 151105), (235, 91306), (355, 60442), (470, 45653), (643, 33370), (710, 30221), (1286, 16685), (3215, 6674), (3337, 6430)]