285520

素因数分解:

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

素因数の和:139

約数の個数: 40

約数和(自身を含む): 687456

約数和(自身を除く): 401936

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 83, 86, 166, 172, 215, 332, 344, 415, 430, 664, 688, 830, 860, 1328, 1660, 1720, 3320, 3440, 3569, 6640, 7138, 14276, 17845, 28552, 35690, 57104, 71380, 142760, 285520]

約数ペア:

[(1, 285520), (2, 142760), (4, 71380), (5, 57104), (8, 35690), (10, 28552), (16, 17845), (20, 14276), (40, 7138), (43, 6640), (80, 3569), (83, 3440), (86, 3320), (166, 1720), (172, 1660), (215, 1328), (332, 860), (344, 830), (415, 688), (430, 664)]