81615280

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{127}}^1\times {\mathrm{277}}^1$

素因数の和:446

約数の個数: 80

約数和(自身を含む): 198558720

約数和(自身を除く): 116943440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 127, 145, 232, 254, 277, 290, 464, 508, 554, 580, 635, 1016, 1108, 1160, 1270, 1385, 2032, 2216, 2320, 2540, 2770, 3683, 4432, 5080, 5540, 7366, 8033, 10160, 11080, 14732, 16066, 18415, 22160, 29464, 32132, 35179, 36830, 40165, 58928, 64264, 70358, 73660, 80330, 128528, 140716, 147320, 160660, 175895, 281432, 294640, 321320, 351790, 562864, 642640, 703580, 1020191, 1407160, 2040382, 2814320, 4080764, 5100955, 8161528, 10201910, 16323056, 20403820, 40807640, 81615280]

約数ペア:

[(1, 81615280), (2, 40807640), (4, 20403820), (5, 16323056), (8, 10201910), (10, 8161528), (16, 5100955), (20, 4080764), (29, 2814320), (40, 2040382), (58, 1407160), (80, 1020191), (116, 703580), (127, 642640), (145, 562864), (232, 351790), (254, 321320), (277, 294640), (290, 281432), (464, 175895), (508, 160660), (554, 147320), (580, 140716), (635, 128528), (1016, 80330), (1108, 73660), (1160, 70358), (1270, 64264), (1385, 58928), (2032, 40165), (2216, 36830), (2320, 35179), (2540, 32132), (2770, 29464), (3683, 22160), (4432, 18415), (5080, 16066), (5540, 14732), (7366, 11080), (8033, 10160)]