128515508720

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{349}}^1\times {\mathrm{51719}}^1$

素因数の和:52170

約数の個数: 80

約数和(自身を含む): 303027480000

約数和(自身を除く): 174511971280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 349, 356, 445, 698, 712, 890, 1396, 1424, 1745, 1780, 2792, 3490, 3560, 5584, 6980, 7120, 13960, 27920, 31061, 51719, 62122, 103438, 124244, 155305, 206876, 248488, 258595, 310610, 413752, 496976, 517190, 621220, 827504, 1034380, 1242440, 2068760, 2484880, 4137520, 4602991, 9205982, 18049931, 18411964, 23014955, 36099862, 36823928, 46029910, 72199724, 73647856, 90249655, 92059820, 144399448, 180499310, 184119640, 288798896, 360998620, 368239280, 721997240, 1443994480, 1606443859, 3212887718, 6425775436, 8032219295, 12851550872, 16064438590, 25703101744, 32128877180, 64257754360, 128515508720]

約数ペア:

[(1, 128515508720), (2, 64257754360), (4, 32128877180), (5, 25703101744), (8, 16064438590), (10, 12851550872), (16, 8032219295), (20, 6425775436), (40, 3212887718), (80, 1606443859), (89, 1443994480), (178, 721997240), (349, 368239280), (356, 360998620), (445, 288798896), (698, 184119640), (712, 180499310), (890, 144399448), (1396, 92059820), (1424, 90249655), (1745, 73647856), (1780, 72199724), (2792, 46029910), (3490, 36823928), (3560, 36099862), (5584, 23014955), (6980, 18411964), (7120, 18049931), (13960, 9205982), (27920, 4602991), (31061, 4137520), (51719, 2484880), (62122, 2068760), (103438, 1242440), (124244, 1034380), (155305, 827504), (206876, 621220), (248488, 517190), (258595, 496976), (310610, 413752)]