81399380

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1\times {\mathrm{439}}^1$

素因数の和:648

約数の個数: 48

約数和(自身を含む): 175042560

約数和(自身を除く): 93643180

約数列:

[1, 2, 4, 5, 10, 20, 73, 127, 146, 254, 292, 365, 439, 508, 635, 730, 878, 1270, 1460, 1756, 2195, 2540, 4390, 8780, 9271, 18542, 32047, 37084, 46355, 55753, 64094, 92710, 111506, 128188, 160235, 185420, 223012, 278765, 320470, 557530, 640940, 1115060, 4069969, 8139938, 16279876, 20349845, 40699690, 81399380]

約数ペア:

[(1, 81399380), (2, 40699690), (4, 20349845), (5, 16279876), (10, 8139938), (20, 4069969), (73, 1115060), (127, 640940), (146, 557530), (254, 320470), (292, 278765), (365, 223012), (439, 185420), (508, 160235), (635, 128188), (730, 111506), (878, 92710), (1270, 64094), (1460, 55753), (1756, 46355), (2195, 37084), (2540, 32047), (4390, 18542), (8780, 9271)]