20365569

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:270

約数の個数: 48

約数和(自身を含む): 35493120

約数和(自身を除く): 15127551

約数列:

[1, 3, 7, 9, 21, 29, 63, 71, 87, 157, 203, 213, 261, 471, 497, 609, 639, 1099, 1413, 1491, 1827, 2059, 3297, 4473, 4553, 6177, 9891, 11147, 13659, 14413, 18531, 31871, 33441, 40977, 43239, 78029, 95613, 100323, 129717, 234087, 286839, 323263, 702261, 969789, 2262841, 2909367, 6788523, 20365569]

約数ペア:

[(1, 20365569), (3, 6788523), (7, 2909367), (9, 2262841), (21, 969789), (29, 702261), (63, 323263), (71, 286839), (87, 234087), (157, 129717), (203, 100323), (213, 95613), (261, 78029), (471, 43239), (497, 40977), (609, 33441), (639, 31871), (1099, 18531), (1413, 14413), (1491, 13659), (1827, 11147), (2059, 9891), (3297, 6177), (4473, 4553)]