20280540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{443}}^1$

素因数の和:571

約数の個数: 96

約数和(自身を含む): 65640960

約数和(自身を除く): 45360420

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 109, 140, 210, 218, 327, 420, 436, 443, 545, 654, 763, 886, 1090, 1308, 1329, 1526, 1635, 1772, 2180, 2215, 2289, 2658, 3052, 3101, 3270, 3815, 4430, 4578, 5316, 6202, 6540, 6645, 7630, 8860, 9156, 9303, 11445, 12404, 13290, 15260, 15505, 18606, 22890, 26580, 31010, 37212, 45780, 46515, 48287, 62020, 93030, 96574, 144861, 186060, 193148, 241435, 289722, 338009, 482870, 579444, 676018, 724305, 965740, 1014027, 1352036, 1448610, 1690045, 2028054, 2897220, 3380090, 4056108, 5070135, 6760180, 10140270, 20280540]

約数ペア:

[(1, 20280540), (2, 10140270), (3, 6760180), (4, 5070135), (5, 4056108), (6, 3380090), (7, 2897220), (10, 2028054), (12, 1690045), (14, 1448610), (15, 1352036), (20, 1014027), (21, 965740), (28, 724305), (30, 676018), (35, 579444), (42, 482870), (60, 338009), (70, 289722), (84, 241435), (105, 193148), (109, 186060), (140, 144861), (210, 96574), (218, 93030), (327, 62020), (420, 48287), (436, 46515), (443, 45780), (545, 37212), (654, 31010), (763, 26580), (886, 22890), (1090, 18606), (1308, 15505), (1329, 15260), (1526, 13290), (1635, 12404), (1772, 11445), (2180, 9303), (2215, 9156), (2289, 8860), (2658, 7630), (3052, 6645), (3101, 6540), (3270, 6202), (3815, 5316), (4430, 4578)]