9987580

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{181}}^1$

素因数の和:310

約数の個数: 48

約数和(自身を含む): 22014720

約数和(自身を除く): 12027140

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 89, 124, 155, 178, 181, 310, 356, 362, 445, 620, 724, 890, 905, 1780, 1810, 2759, 3620, 5518, 5611, 11036, 11222, 13795, 16109, 22444, 27590, 28055, 32218, 55180, 56110, 64436, 80545, 112220, 161090, 322180, 499379, 998758, 1997516, 2496895, 4993790, 9987580]

約数ペア:

[(1, 9987580), (2, 4993790), (4, 2496895), (5, 1997516), (10, 998758), (20, 499379), (31, 322180), (62, 161090), (89, 112220), (124, 80545), (155, 64436), (178, 56110), (181, 55180), (310, 32218), (356, 28055), (362, 27590), (445, 22444), (620, 16109), (724, 13795), (890, 11222), (905, 11036), (1780, 5611), (1810, 5518), (2759, 3620)]