138678920

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{27299}}^1$

素因数の和:27437

約数の個数: 32

約数和(自身を含む): 314496000

約数和(自身を除く): 175817080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 5080, 27299, 54598, 109196, 136495, 218392, 272990, 545980, 1091960, 3466973, 6933946, 13867892, 17334865, 27735784, 34669730, 69339460, 138678920]

約数ペア:

[(1, 138678920), (2, 69339460), (4, 34669730), (5, 27735784), (8, 17334865), (10, 13867892), (20, 6933946), (40, 3466973), (127, 1091960), (254, 545980), (508, 272990), (635, 218392), (1016, 136495), (1270, 109196), (2540, 54598), (5080, 27299)]