28687880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1283}}^1$

素因数の和:1350

約数の個数: 64

約数和(自身を含む): 71184960

約数和(自身を除く): 42497080

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 43, 52, 65, 86, 104, 130, 172, 215, 260, 344, 430, 520, 559, 860, 1118, 1283, 1720, 2236, 2566, 2795, 4472, 5132, 5590, 6415, 10264, 11180, 12830, 16679, 22360, 25660, 33358, 51320, 55169, 66716, 83395, 110338, 133432, 166790, 220676, 275845, 333580, 441352, 551690, 667160, 717197, 1103380, 1434394, 2206760, 2868788, 3585985, 5737576, 7171970, 14343940, 28687880]

約数ペア:

[(1, 28687880), (2, 14343940), (4, 7171970), (5, 5737576), (8, 3585985), (10, 2868788), (13, 2206760), (20, 1434394), (26, 1103380), (40, 717197), (43, 667160), (52, 551690), (65, 441352), (86, 333580), (104, 275845), (130, 220676), (172, 166790), (215, 133432), (260, 110338), (344, 83395), (430, 66716), (520, 55169), (559, 51320), (860, 33358), (1118, 25660), (1283, 22360), (1720, 16679), (2236, 12830), (2566, 11180), (2795, 10264), (4472, 6415), (5132, 5590)]