20951660

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{719}}^1$

素因数の和:806

約数の個数: 48

約数和(自身を含む): 46448640

約数和(自身を除く): 25496980

約数列:

[1, 2, 4, 5, 10, 20, 31, 47, 62, 94, 124, 155, 188, 235, 310, 470, 620, 719, 940, 1438, 1457, 2876, 2914, 3595, 5828, 7190, 7285, 14380, 14570, 22289, 29140, 33793, 44578, 67586, 89156, 111445, 135172, 168965, 222890, 337930, 445780, 675860, 1047583, 2095166, 4190332, 5237915, 10475830, 20951660]

約数ペア:

[(1, 20951660), (2, 10475830), (4, 5237915), (5, 4190332), (10, 2095166), (20, 1047583), (31, 675860), (47, 445780), (62, 337930), (94, 222890), (124, 168965), (155, 135172), (188, 111445), (235, 89156), (310, 67586), (470, 44578), (620, 33793), (719, 29140), (940, 22289), (1438, 14570), (1457, 14380), (2876, 7285), (2914, 7190), (3595, 5828)]