20352860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1303}}^1$

素因数の和:1394

約数の個数: 48

約数和(自身を含む): 47319552

約数和(自身を除く): 26966692

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 110, 142, 220, 284, 355, 710, 781, 1303, 1420, 1562, 2606, 3124, 3905, 5212, 6515, 7810, 13030, 14333, 15620, 26060, 28666, 57332, 71665, 92513, 143330, 185026, 286660, 370052, 462565, 925130, 1017643, 1850260, 2035286, 4070572, 5088215, 10176430, 20352860]

約数ペア:

[(1, 20352860), (2, 10176430), (4, 5088215), (5, 4070572), (10, 2035286), (11, 1850260), (20, 1017643), (22, 925130), (44, 462565), (55, 370052), (71, 286660), (110, 185026), (142, 143330), (220, 92513), (284, 71665), (355, 57332), (710, 28666), (781, 26060), (1303, 15620), (1420, 14333), (1562, 13030), (2606, 7810), (3124, 6515), (3905, 5212)]