80157320

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{509}}^1$

素因数の和:678

約数の個数: 64

約数和(自身を含む): 188006400

約数和(自身を除く): 107849080

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 127, 155, 248, 254, 310, 508, 509, 620, 635, 1016, 1018, 1240, 1270, 2036, 2540, 2545, 3937, 4072, 5080, 5090, 7874, 10180, 15748, 15779, 19685, 20360, 31496, 31558, 39370, 63116, 64643, 78740, 78895, 126232, 129286, 157480, 157790, 258572, 315580, 323215, 517144, 631160, 646430, 1292860, 2003933, 2585720, 4007866, 8015732, 10019665, 16031464, 20039330, 40078660, 80157320]

約数ペア:

[(1, 80157320), (2, 40078660), (4, 20039330), (5, 16031464), (8, 10019665), (10, 8015732), (20, 4007866), (31, 2585720), (40, 2003933), (62, 1292860), (124, 646430), (127, 631160), (155, 517144), (248, 323215), (254, 315580), (310, 258572), (508, 157790), (509, 157480), (620, 129286), (635, 126232), (1016, 78895), (1018, 78740), (1240, 64643), (1270, 63116), (2036, 39370), (2540, 31558), (2545, 31496), (3937, 20360), (4072, 19685), (5080, 15779), (5090, 15748), (7874, 10180)]