20955620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{59}}^2$

素因数の和:177

約数の個数: 72

約数和(自身を含む): 52350144

約数和(自身を除く): 31394524

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 59, 70, 86, 118, 140, 172, 215, 236, 295, 301, 413, 430, 590, 602, 826, 860, 1180, 1204, 1505, 1652, 2065, 2537, 3010, 3481, 4130, 5074, 6020, 6962, 8260, 10148, 12685, 13924, 17405, 17759, 24367, 25370, 34810, 35518, 48734, 50740, 69620, 71036, 88795, 97468, 121835, 149683, 177590, 243670, 299366, 355180, 487340, 598732, 748415, 1047781, 1496830, 2095562, 2993660, 4191124, 5238905, 10477810, 20955620]

約数ペア:

[(1, 20955620), (2, 10477810), (4, 5238905), (5, 4191124), (7, 2993660), (10, 2095562), (14, 1496830), (20, 1047781), (28, 748415), (35, 598732), (43, 487340), (59, 355180), (70, 299366), (86, 243670), (118, 177590), (140, 149683), (172, 121835), (215, 97468), (236, 88795), (295, 71036), (301, 69620), (413, 50740), (430, 48734), (590, 35518), (602, 34810), (826, 25370), (860, 24367), (1180, 17759), (1204, 17405), (1505, 13924), (1652, 12685), (2065, 10148), (2537, 8260), (3010, 6962), (3481, 6020), (4130, 5074)]