20391245

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{797}}^1$

素因数の和:869

約数の個数: 32

約数和(自身を含む): 30336768

約数和(自身を除く): 9945523

約数列:

[1, 5, 7, 17, 35, 43, 85, 119, 215, 301, 595, 731, 797, 1505, 3655, 3985, 5117, 5579, 13549, 25585, 27895, 34271, 67745, 94843, 171355, 239897, 474215, 582607, 1199485, 2913035, 4078249, 20391245]

約数ペア:

[(1, 20391245), (5, 4078249), (7, 2913035), (17, 1199485), (35, 582607), (43, 474215), (85, 239897), (119, 171355), (215, 94843), (301, 67745), (595, 34271), (731, 27895), (797, 25585), (1505, 13549), (3655, 5579), (3985, 5117)]