20927480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2411}}^1$

素因数の和:2460

約数の個数: 64

約数和(自身を含む): 55572480

約数和(自身を除く): 34645000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 2411, 4340, 4822, 8680, 9644, 12055, 16877, 19288, 24110, 33754, 48220, 67508, 74741, 84385, 96440, 135016, 149482, 168770, 298964, 337540, 373705, 523187, 597928, 675080, 747410, 1046374, 1494820, 2092748, 2615935, 2989640, 4185496, 5231870, 10463740, 20927480]

約数ペア:

[(1, 20927480), (2, 10463740), (4, 5231870), (5, 4185496), (7, 2989640), (8, 2615935), (10, 2092748), (14, 1494820), (20, 1046374), (28, 747410), (31, 675080), (35, 597928), (40, 523187), (56, 373705), (62, 337540), (70, 298964), (124, 168770), (140, 149482), (155, 135016), (217, 96440), (248, 84385), (280, 74741), (310, 67508), (434, 48220), (620, 33754), (868, 24110), (1085, 19288), (1240, 16877), (1736, 12055), (2170, 9644), (2411, 8680), (4340, 4822)]