28981520

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{5407}}^1$

素因数の和:5487

約数の個数: 40

約数和(自身を含む): 68400384

約数和(自身を除く): 39418864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 5360, 5407, 10814, 21628, 27035, 43256, 54070, 86512, 108140, 216280, 362269, 432560, 724538, 1449076, 1811345, 2898152, 3622690, 5796304, 7245380, 14490760, 28981520]

約数ペア:

[(1, 28981520), (2, 14490760), (4, 7245380), (5, 5796304), (8, 3622690), (10, 2898152), (16, 1811345), (20, 1449076), (40, 724538), (67, 432560), (80, 362269), (134, 216280), (268, 108140), (335, 86512), (536, 54070), (670, 43256), (1072, 27035), (1340, 21628), (2680, 10814), (5360, 5407)]