21780410

素因数分解:

$2^1\times 5^1\times {\mathrm{223}}^1\times {\mathrm{9767}}^1$

素因数の和:9997

約数の個数: 16

約数和(自身を含む): 39384576

約数和(自身を除く): 17604166

約数列:

[1, 2, 5, 10, 223, 446, 1115, 2230, 9767, 19534, 48835, 97670, 2178041, 4356082, 10890205, 21780410]

約数ペア:

[(1, 21780410), (2, 10890205), (5, 4356082), (10, 2178041), (223, 97670), (446, 48835), (1115, 19534), (2230, 9767)]