665558590

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{197}}^1\times {\mathrm{397}}^1$

素因数の和:661

約数の個数: 64

約数和(自身を含む): 1293646464

約数和(自身を除く): 628087874

約数列:

[1, 2, 5, 10, 23, 37, 46, 74, 115, 185, 197, 230, 370, 394, 397, 794, 851, 985, 1702, 1970, 1985, 3970, 4255, 4531, 7289, 8510, 9062, 9131, 14578, 14689, 18262, 22655, 29378, 36445, 45310, 45655, 72890, 73445, 78209, 91310, 146890, 156418, 167647, 335294, 337847, 391045, 675694, 782090, 838235, 1676470, 1689235, 1798807, 2893733, 3378470, 3597614, 5787466, 8994035, 14468665, 17988070, 28937330, 66555859, 133111718, 332779295, 665558590]

約数ペア:

[(1, 665558590), (2, 332779295), (5, 133111718), (10, 66555859), (23, 28937330), (37, 17988070), (46, 14468665), (74, 8994035), (115, 5787466), (185, 3597614), (197, 3378470), (230, 2893733), (370, 1798807), (394, 1689235), (397, 1676470), (794, 838235), (851, 782090), (985, 675694), (1702, 391045), (1970, 337847), (1985, 335294), (3970, 167647), (4255, 156418), (4531, 146890), (7289, 91310), (8510, 78209), (9062, 73445), (9131, 72890), (14578, 45655), (14689, 45310), (18262, 36445), (22655, 29378)]