20579728

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{607}}^1$

素因数の和:791

約数の個数: 40

約数和(自身を含む): 43275008

約数和(自身を除く): 22695280

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 163, 208, 326, 607, 652, 1214, 1304, 2119, 2428, 2608, 4238, 4856, 7891, 8476, 9712, 15782, 16952, 31564, 33904, 63128, 98941, 126256, 197882, 395764, 791528, 1286233, 1583056, 2572466, 5144932, 10289864, 20579728]

約数ペア:

[(1, 20579728), (2, 10289864), (4, 5144932), (8, 2572466), (13, 1583056), (16, 1286233), (26, 791528), (52, 395764), (104, 197882), (163, 126256), (208, 98941), (326, 63128), (607, 33904), (652, 31564), (1214, 16952), (1304, 15782), (2119, 9712), (2428, 8476), (2608, 7891), (4238, 4856)]