64578980

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{38903}}^1$

素因数の和:38995

約数の個数: 24

約数和(自身を含む): 137253312

約数和(自身を除く): 72674332

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 38903, 77806, 155612, 194515, 389030, 778060, 3228949, 6457898, 12915796, 16144745, 32289490, 64578980]

約数ペア:

[(1, 64578980), (2, 32289490), (4, 16144745), (5, 12915796), (10, 6457898), (20, 3228949), (83, 778060), (166, 389030), (332, 194515), (415, 155612), (830, 77806), (1660, 38903)]