7780420

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:244

約数の個数: 48

約数和(自身を含む): 17075520

約数和(自身を除く): 9295100

約数列:

[1, 2, 4, 5, 10, 20, 43, 83, 86, 109, 166, 172, 215, 218, 332, 415, 430, 436, 545, 830, 860, 1090, 1660, 2180, 3569, 4687, 7138, 9047, 9374, 14276, 17845, 18094, 18748, 23435, 35690, 36188, 45235, 46870, 71380, 90470, 93740, 180940, 389021, 778042, 1556084, 1945105, 3890210, 7780420]

約数ペア:

[(1, 7780420), (2, 3890210), (4, 1945105), (5, 1556084), (10, 778042), (20, 389021), (43, 180940), (83, 93740), (86, 90470), (109, 71380), (166, 46870), (172, 45235), (215, 36188), (218, 35690), (332, 23435), (415, 18748), (430, 18094), (436, 17845), (545, 14276), (830, 9374), (860, 9047), (1090, 7138), (1660, 4687), (2180, 3569)]