28393911

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{937}}^1$

素因数の和:1000

約数の個数: 48

約数和(自身を含む): 51897664

約数和(自身を除く): 23503753

約数列:

[1, 3, 7, 9, 13, 21, 37, 39, 63, 91, 111, 117, 259, 273, 333, 481, 777, 819, 937, 1443, 2331, 2811, 3367, 4329, 6559, 8433, 10101, 12181, 19677, 30303, 34669, 36543, 59031, 85267, 104007, 109629, 242683, 255801, 312021, 450697, 728049, 767403, 1352091, 2184147, 3154879, 4056273, 9464637, 28393911]

約数ペア:

[(1, 28393911), (3, 9464637), (7, 4056273), (9, 3154879), (13, 2184147), (21, 1352091), (37, 767403), (39, 728049), (63, 450697), (91, 312021), (111, 255801), (117, 242683), (259, 109629), (273, 104007), (333, 85267), (481, 59031), (777, 36543), (819, 34669), (937, 30303), (1443, 19677), (2331, 12181), (2811, 10101), (3367, 8433), (4329, 6559)]