20491275

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1697}}^1$

素因数の和:1740

約数の個数: 48

約数和(自身を含む): 40425984

約数和(自身を除く): 19934709

約数列:

[1, 3, 5, 7, 15, 21, 23, 25, 35, 69, 75, 105, 115, 161, 175, 345, 483, 525, 575, 805, 1697, 1725, 2415, 4025, 5091, 8485, 11879, 12075, 25455, 35637, 39031, 42425, 59395, 117093, 127275, 178185, 195155, 273217, 296975, 585465, 819651, 890925, 975775, 1366085, 2927325, 4098255, 6830425, 20491275]

約数ペア:

[(1, 20491275), (3, 6830425), (5, 4098255), (7, 2927325), (15, 1366085), (21, 975775), (23, 890925), (25, 819651), (35, 585465), (69, 296975), (75, 273217), (105, 195155), (115, 178185), (161, 127275), (175, 117093), (345, 59395), (483, 42425), (525, 39031), (575, 35637), (805, 25455), (1697, 12075), (1725, 11879), (2415, 8485), (4025, 5091)]