18860440

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{229}}^1$

素因数の和:340

約数の個数: 64

約数和(自身を含む): 44712000

約数和(自身を除く): 25851560

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 71, 116, 142, 145, 229, 232, 284, 290, 355, 458, 568, 580, 710, 916, 1145, 1160, 1420, 1832, 2059, 2290, 2840, 4118, 4580, 6641, 8236, 9160, 10295, 13282, 16259, 16472, 20590, 26564, 32518, 33205, 41180, 53128, 65036, 66410, 81295, 82360, 130072, 132820, 162590, 265640, 325180, 471511, 650360, 943022, 1886044, 2357555, 3772088, 4715110, 9430220, 18860440]

約数ペア:

[(1, 18860440), (2, 9430220), (4, 4715110), (5, 3772088), (8, 2357555), (10, 1886044), (20, 943022), (29, 650360), (40, 471511), (58, 325180), (71, 265640), (116, 162590), (142, 132820), (145, 130072), (229, 82360), (232, 81295), (284, 66410), (290, 65036), (355, 53128), (458, 41180), (568, 33205), (580, 32518), (710, 26564), (916, 20590), (1145, 16472), (1160, 16259), (1420, 13282), (1832, 10295), (2059, 9160), (2290, 8236), (2840, 6641), (4118, 4580)]