21328120

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{48473}}^1$

素因数の和:48495

約数の個数: 32

約数和(自身を含む): 52351920

約数和(自身を除く): 31023800

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 48473, 96946, 193892, 242365, 387784, 484730, 533203, 969460, 1066406, 1938920, 2132812, 2666015, 4265624, 5332030, 10664060, 21328120]

約数ペア:

[(1, 21328120), (2, 10664060), (4, 5332030), (5, 4265624), (8, 2666015), (10, 2132812), (11, 1938920), (20, 1066406), (22, 969460), (40, 533203), (44, 484730), (55, 387784), (88, 242365), (110, 193892), (220, 96946), (440, 48473)]