20991432008

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{1381}}^1\times {\mathrm{61291}}^1$

素因数の和:62709

約数の個数: 32

約数和(自身を含む): 40658661120

約数和(自身を除く): 19667229112

約数列:

[1, 2, 4, 8, 31, 62, 124, 248, 1381, 2762, 5524, 11048, 42811, 61291, 85622, 122582, 171244, 245164, 342488, 490328, 1900021, 3800042, 7600084, 15200168, 84642871, 169285742, 338571484, 677142968, 2623929001, 5247858002, 10495716004, 20991432008]

約数ペア:

[(1, 20991432008), (2, 10495716004), (4, 5247858002), (8, 2623929001), (31, 677142968), (62, 338571484), (124, 169285742), (248, 84642871), (1381, 15200168), (2762, 7600084), (5524, 3800042), (11048, 1900021), (42811, 490328), (61291, 342488), (85622, 245164), (122582, 171244)]