31221040

素因数分解:

$2^4\times 5^1\times {\mathrm{390263}}^1$

素因数の和:390276

約数の個数: 20

約数和(自身を含む): 72589104

約数和(自身を除く): 41368064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 390263, 780526, 1561052, 1951315, 3122104, 3902630, 6244208, 7805260, 15610520, 31221040]

約数ペア:

[(1, 31221040), (2, 15610520), (4, 7805260), (5, 6244208), (8, 3902630), (10, 3122104), (16, 1951315), (20, 1561052), (40, 780526), (80, 390263)]