64647140

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{199}}^1\times {\mathrm{439}}^1$

素因数の和:684

約数の個数: 48

約数和(自身を含む): 140448000

約数和(自身を除く): 75800860

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 199, 370, 398, 439, 740, 796, 878, 995, 1756, 1990, 2195, 3980, 4390, 7363, 8780, 14726, 16243, 29452, 32486, 36815, 64972, 73630, 81215, 87361, 147260, 162430, 174722, 324860, 349444, 436805, 873610, 1747220, 3232357, 6464714, 12929428, 16161785, 32323570, 64647140]

約数ペア:

[(1, 64647140), (2, 32323570), (4, 16161785), (5, 12929428), (10, 6464714), (20, 3232357), (37, 1747220), (74, 873610), (148, 436805), (185, 349444), (199, 324860), (370, 174722), (398, 162430), (439, 147260), (740, 87361), (796, 81215), (878, 73630), (995, 64972), (1756, 36815), (1990, 32486), (2195, 29452), (3980, 16243), (4390, 14726), (7363, 8780)]