668889290

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{809}}^1\times {\mathrm{929}}^1$

素因数の和:1834

約数の個数: 32

約数和(自身を含む): 1220346000

約数和(自身を除く): 551456710

約数列:

[1, 2, 5, 10, 89, 178, 445, 809, 890, 929, 1618, 1858, 4045, 4645, 8090, 9290, 72001, 82681, 144002, 165362, 360005, 413405, 720010, 751561, 826810, 1503122, 3757805, 7515610, 66888929, 133777858, 334444645, 668889290]

約数ペア:

[(1, 668889290), (2, 334444645), (5, 133777858), (10, 66888929), (89, 7515610), (178, 3757805), (445, 1503122), (809, 826810), (890, 751561), (929, 720010), (1618, 413405), (1858, 360005), (4045, 165362), (4645, 144002), (8090, 82681), (9290, 72001)]