20318940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{719}}^1$

素因数の和:891

約数の個数: 72

約数和(自身を含む): 62112960

約数和(自身を除く): 41794020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 157, 180, 314, 471, 628, 719, 785, 942, 1413, 1438, 1570, 1884, 2157, 2355, 2826, 2876, 3140, 3595, 4314, 4710, 5652, 6471, 7065, 7190, 8628, 9420, 10785, 12942, 14130, 14380, 21570, 25884, 28260, 32355, 43140, 64710, 112883, 129420, 225766, 338649, 451532, 564415, 677298, 1015947, 1128830, 1354596, 1693245, 2031894, 2257660, 3386490, 4063788, 5079735, 6772980, 10159470, 20318940]

約数ペア:

[(1, 20318940), (2, 10159470), (3, 6772980), (4, 5079735), (5, 4063788), (6, 3386490), (9, 2257660), (10, 2031894), (12, 1693245), (15, 1354596), (18, 1128830), (20, 1015947), (30, 677298), (36, 564415), (45, 451532), (60, 338649), (90, 225766), (157, 129420), (180, 112883), (314, 64710), (471, 43140), (628, 32355), (719, 28260), (785, 25884), (942, 21570), (1413, 14380), (1438, 14130), (1570, 12942), (1884, 10785), (2157, 9420), (2355, 8628), (2826, 7190), (2876, 7065), (3140, 6471), (3595, 5652), (4314, 4710)]