17980960

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{2741}}^1$

素因数の和:2797

約数の個数: 48

約数和(自身を含む): 43531992

約数和(自身を除く): 25551032

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 2741, 3280, 5482, 6560, 10964, 13705, 21928, 27410, 43856, 54820, 87712, 109640, 112381, 219280, 224762, 438560, 449524, 561905, 899048, 1123810, 1798096, 2247620, 3596192, 4495240, 8990480, 17980960]

約数ペア:

[(1, 17980960), (2, 8990480), (4, 4495240), (5, 3596192), (8, 2247620), (10, 1798096), (16, 1123810), (20, 899048), (32, 561905), (40, 449524), (41, 438560), (80, 224762), (82, 219280), (160, 112381), (164, 109640), (205, 87712), (328, 54820), (410, 43856), (656, 27410), (820, 21928), (1312, 13705), (1640, 10964), (2741, 6560), (3280, 5482)]