18340640

素因数分解:

$2^5\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1451}}^1$

素因数の和:1545

約数の個数: 48

約数和(自身を含む): 43908480

約数和(自身を除く): 25567840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 79, 80, 158, 160, 316, 395, 632, 790, 1264, 1451, 1580, 2528, 2902, 3160, 5804, 6320, 7255, 11608, 12640, 14510, 23216, 29020, 46432, 58040, 114629, 116080, 229258, 232160, 458516, 573145, 917032, 1146290, 1834064, 2292580, 3668128, 4585160, 9170320, 18340640]

約数ペア:

[(1, 18340640), (2, 9170320), (4, 4585160), (5, 3668128), (8, 2292580), (10, 1834064), (16, 1146290), (20, 917032), (32, 573145), (40, 458516), (79, 232160), (80, 229258), (158, 116080), (160, 114629), (316, 58040), (395, 46432), (632, 29020), (790, 23216), (1264, 14510), (1451, 12640), (1580, 11608), (2528, 7255), (2902, 6320), (3160, 5804)]