81354040

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{4831}}^1$

素因数の和:5263

約数の個数: 32

約数和(自身を含む): 183519360

約数和(自身を除く): 102165320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1684, 2105, 3368, 4210, 4831, 8420, 9662, 16840, 19324, 24155, 38648, 48310, 96620, 193240, 2033851, 4067702, 8135404, 10169255, 16270808, 20338510, 40677020, 81354040]

約数ペア:

[(1, 81354040), (2, 40677020), (4, 20338510), (5, 16270808), (8, 10169255), (10, 8135404), (20, 4067702), (40, 2033851), (421, 193240), (842, 96620), (1684, 48310), (2105, 38648), (3368, 24155), (4210, 19324), (4831, 16840), (8420, 9662)]