20987930

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{857}}^1$

素因数の和:974

約数の個数: 32

約数和(自身を含む): 39536640

約数和(自身を除く): 18548710

約数列:

[1, 2, 5, 10, 31, 62, 79, 155, 158, 310, 395, 790, 857, 1714, 2449, 4285, 4898, 8570, 12245, 24490, 26567, 53134, 67703, 132835, 135406, 265670, 338515, 677030, 2098793, 4197586, 10493965, 20987930]

約数ペア:

[(1, 20987930), (2, 10493965), (5, 4197586), (10, 2098793), (31, 677030), (62, 338515), (79, 265670), (155, 135406), (158, 132835), (310, 67703), (395, 53134), (790, 26567), (857, 24490), (1714, 12245), (2449, 8570), (4285, 4898)]