28400980

素因数分解:

$2^2\times 5^1\times {\mathrm{857}}^1\times {\mathrm{1657}}^1$

素因数の和:2523

約数の個数: 24

約数和(自身を含む): 59747688

約数和(自身を除く): 31346708

約数列:

[1, 2, 4, 5, 10, 20, 857, 1657, 1714, 3314, 3428, 4285, 6628, 8285, 8570, 16570, 17140, 33140, 1420049, 2840098, 5680196, 7100245, 14200490, 28400980]

約数ペア:

[(1, 28400980), (2, 14200490), (4, 7100245), (5, 5680196), (10, 2840098), (20, 1420049), (857, 33140), (1657, 17140), (1714, 16570), (3314, 8570), (3428, 8285), (4285, 6628)]