21378912

素因数分解:

$2^5\times 3^1\times {\mathrm{43}}^1\times {\mathrm{5179}}^1$

素因数の和:5235

約数の個数: 48

約数和(自身を含む): 57435840

約数和(自身を除く): 36056928

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 43, 48, 86, 96, 129, 172, 258, 344, 516, 688, 1032, 1376, 2064, 4128, 5179, 10358, 15537, 20716, 31074, 41432, 62148, 82864, 124296, 165728, 222697, 248592, 445394, 497184, 668091, 890788, 1336182, 1781576, 2672364, 3563152, 5344728, 7126304, 10689456, 21378912]

約数ペア:

[(1, 21378912), (2, 10689456), (3, 7126304), (4, 5344728), (6, 3563152), (8, 2672364), (12, 1781576), (16, 1336182), (24, 890788), (32, 668091), (43, 497184), (48, 445394), (86, 248592), (96, 222697), (129, 165728), (172, 124296), (258, 82864), (344, 62148), (516, 41432), (688, 31074), (1032, 20716), (1376, 15537), (2064, 10358), (4128, 5179)]