20493809

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{101}}^2$

素因数の和:257

約数の個数: 18

約数和(自身を含む): 24665382

約数和(自身を除く): 4171573

約数列:

[1, 7, 41, 49, 101, 287, 707, 2009, 4141, 4949, 10201, 28987, 71407, 202909, 418241, 499849, 2927687, 20493809]

約数ペア:

[(1, 20493809), (7, 2927687), (41, 499849), (49, 418241), (101, 202909), (287, 71407), (707, 28987), (2009, 10201), (4141, 4949)]