20105553

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{631}}^1$

素因数の和:709

約数の個数: 32

約数和(自身を含む): 31144960

約数和(自身を除く): 11039407

約数列:

[1, 3, 13, 19, 39, 43, 57, 129, 247, 559, 631, 741, 817, 1677, 1893, 2451, 8203, 10621, 11989, 24609, 27133, 31863, 35967, 81399, 155857, 352729, 467571, 515527, 1058187, 1546581, 6701851, 20105553]

約数ペア:

[(1, 20105553), (3, 6701851), (13, 1546581), (19, 1058187), (39, 515527), (43, 467571), (57, 352729), (129, 155857), (247, 81399), (559, 35967), (631, 31863), (741, 27133), (817, 24609), (1677, 11989), (1893, 10621), (2451, 8203)]