12456520

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{2857}}^1$

素因数の和:2977

約数の個数: 32

約数和(自身を含む): 28294200

約数和(自身を除く): 15837680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 2857, 4360, 5714, 11428, 14285, 22856, 28570, 57140, 114280, 311413, 622826, 1245652, 1557065, 2491304, 3114130, 6228260, 12456520]

約数ペア:

[(1, 12456520), (2, 6228260), (4, 3114130), (5, 2491304), (8, 1557065), (10, 1245652), (20, 622826), (40, 311413), (109, 114280), (218, 57140), (436, 28570), (545, 22856), (872, 14285), (1090, 11428), (2180, 5714), (2857, 4360)]