129715720

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1\times {\mathrm{439}}^1$

素因数の和:622

約数の個数: 64

約数和(自身を含む): 299376000

約数和(自身を除く): 169660280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 89, 166, 178, 332, 356, 415, 439, 445, 664, 712, 830, 878, 890, 1660, 1756, 1780, 2195, 3320, 3512, 3560, 4390, 7387, 8780, 14774, 17560, 29548, 36437, 36935, 39071, 59096, 72874, 73870, 78142, 145748, 147740, 156284, 182185, 195355, 291496, 295480, 312568, 364370, 390710, 728740, 781420, 1457480, 1562840, 3242893, 6485786, 12971572, 16214465, 25943144, 32428930, 64857860, 129715720]

約数ペア:

[(1, 129715720), (2, 64857860), (4, 32428930), (5, 25943144), (8, 16214465), (10, 12971572), (20, 6485786), (40, 3242893), (83, 1562840), (89, 1457480), (166, 781420), (178, 728740), (332, 390710), (356, 364370), (415, 312568), (439, 295480), (445, 291496), (664, 195355), (712, 182185), (830, 156284), (878, 147740), (890, 145748), (1660, 78142), (1756, 73870), (1780, 72874), (2195, 59096), (3320, 39071), (3512, 36935), (3560, 36437), (4390, 29548), (7387, 17560), (8780, 14774)]