20395804

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{197}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 42378336

約数和(自身を除く): 21982532

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 143, 181, 197, 286, 362, 394, 572, 724, 788, 1991, 2167, 2353, 2561, 3982, 4334, 4706, 5122, 7964, 8668, 9412, 10244, 25883, 28171, 35657, 51766, 56342, 71314, 103532, 112684, 142628, 392227, 463541, 784454, 927082, 1568908, 1854164, 5098951, 10197902, 20395804]

約数ペア:

[(1, 20395804), (2, 10197902), (4, 5098951), (11, 1854164), (13, 1568908), (22, 927082), (26, 784454), (44, 463541), (52, 392227), (143, 142628), (181, 112684), (197, 103532), (286, 71314), (362, 56342), (394, 51766), (572, 35657), (724, 28171), (788, 25883), (1991, 10244), (2167, 9412), (2353, 8668), (2561, 7964), (3982, 5122), (4334, 4706)]