31121680

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:248

約数の個数: 80

約数和(自身を含む): 75620160

約数和(自身を除く): 44498480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 83, 86, 109, 166, 172, 215, 218, 332, 344, 415, 430, 436, 545, 664, 688, 830, 860, 872, 1090, 1328, 1660, 1720, 1744, 2180, 3320, 3440, 3569, 4360, 4687, 6640, 7138, 8720, 9047, 9374, 14276, 17845, 18094, 18748, 23435, 28552, 35690, 36188, 37496, 45235, 46870, 57104, 71380, 72376, 74992, 90470, 93740, 142760, 144752, 180940, 187480, 285520, 361880, 374960, 389021, 723760, 778042, 1556084, 1945105, 3112168, 3890210, 6224336, 7780420, 15560840, 31121680]

約数ペア:

[(1, 31121680), (2, 15560840), (4, 7780420), (5, 6224336), (8, 3890210), (10, 3112168), (16, 1945105), (20, 1556084), (40, 778042), (43, 723760), (80, 389021), (83, 374960), (86, 361880), (109, 285520), (166, 187480), (172, 180940), (215, 144752), (218, 142760), (332, 93740), (344, 90470), (415, 74992), (430, 72376), (436, 71380), (545, 57104), (664, 46870), (688, 45235), (830, 37496), (860, 36188), (872, 35690), (1090, 28552), (1328, 23435), (1660, 18748), (1720, 18094), (1744, 17845), (2180, 14276), (3320, 9374), (3440, 9047), (3569, 8720), (4360, 7138), (4687, 6640)]