20718971

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{227}}^1$

素因数の和:323

約数の個数: 32

約数和(自身を含む): 27578880

約数和(自身を除く): 6859909

約数列:

[1, 7, 13, 17, 59, 91, 119, 221, 227, 413, 767, 1003, 1547, 1589, 2951, 3859, 5369, 7021, 13039, 13393, 20657, 27013, 50167, 91273, 93751, 174109, 227681, 351169, 1218763, 1593767, 2959853, 20718971]

約数ペア:

[(1, 20718971), (7, 2959853), (13, 1593767), (17, 1218763), (59, 351169), (91, 227681), (119, 174109), (221, 93751), (227, 91273), (413, 50167), (767, 27013), (1003, 20657), (1547, 13393), (1589, 13039), (2951, 7021), (3859, 5369)]