20320510

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{43}}^2\times {\mathrm{157}}^1$

素因数の和:257

約数の個数: 48

約数和(自身を含む): 43069536

約数和(自身を除く): 22749026

約数列:

[1, 2, 5, 7, 10, 14, 35, 43, 70, 86, 157, 215, 301, 314, 430, 602, 785, 1099, 1505, 1570, 1849, 2198, 3010, 3698, 5495, 6751, 9245, 10990, 12943, 13502, 18490, 25886, 33755, 47257, 64715, 67510, 94514, 129430, 236285, 290293, 472570, 580586, 1451465, 2032051, 2902930, 4064102, 10160255, 20320510]

約数ペア:

[(1, 20320510), (2, 10160255), (5, 4064102), (7, 2902930), (10, 2032051), (14, 1451465), (35, 580586), (43, 472570), (70, 290293), (86, 236285), (157, 129430), (215, 94514), (301, 67510), (314, 64715), (430, 47257), (602, 33755), (785, 25886), (1099, 18490), (1505, 13502), (1570, 12943), (1849, 10990), (2198, 9245), (3010, 6751), (3698, 5495)]