20981088

素因数分解:

$2^5\times 3^2\times {\mathrm{263}}^1\times {\mathrm{277}}^1$

素因数の和:556

約数の個数: 72

約数和(自身を含む): 60108048

約数和(自身を除く): 39126960

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 96, 144, 263, 277, 288, 526, 554, 789, 831, 1052, 1108, 1578, 1662, 2104, 2216, 2367, 2493, 3156, 3324, 4208, 4432, 4734, 4986, 6312, 6648, 8416, 8864, 9468, 9972, 12624, 13296, 18936, 19944, 25248, 26592, 37872, 39888, 72851, 75744, 79776, 145702, 218553, 291404, 437106, 582808, 655659, 874212, 1165616, 1311318, 1748424, 2331232, 2622636, 3496848, 5245272, 6993696, 10490544, 20981088]

約数ペア:

[(1, 20981088), (2, 10490544), (3, 6993696), (4, 5245272), (6, 3496848), (8, 2622636), (9, 2331232), (12, 1748424), (16, 1311318), (18, 1165616), (24, 874212), (32, 655659), (36, 582808), (48, 437106), (72, 291404), (96, 218553), (144, 145702), (263, 79776), (277, 75744), (288, 72851), (526, 39888), (554, 37872), (789, 26592), (831, 25248), (1052, 19944), (1108, 18936), (1578, 13296), (1662, 12624), (2104, 9972), (2216, 9468), (2367, 8864), (2493, 8416), (3156, 6648), (3324, 6312), (4208, 4986), (4432, 4734)]