28065520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{2179}}^1$

素因数の和:2222

約数の個数: 80

約数和(自身を含む): 77852160

約数和(自身を除く): 49786640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 460, 560, 644, 805, 920, 1288, 1610, 1840, 2179, 2576, 3220, 4358, 6440, 8716, 10895, 12880, 15253, 17432, 21790, 30506, 34864, 43580, 50117, 61012, 76265, 87160, 100234, 122024, 152530, 174320, 200468, 244048, 250585, 305060, 350819, 400936, 501170, 610120, 701638, 801872, 1002340, 1220240, 1403276, 1754095, 2004680, 2806552, 3508190, 4009360, 5613104, 7016380, 14032760, 28065520]

約数ペア:

[(1, 28065520), (2, 14032760), (4, 7016380), (5, 5613104), (7, 4009360), (8, 3508190), (10, 2806552), (14, 2004680), (16, 1754095), (20, 1403276), (23, 1220240), (28, 1002340), (35, 801872), (40, 701638), (46, 610120), (56, 501170), (70, 400936), (80, 350819), (92, 305060), (112, 250585), (115, 244048), (140, 200468), (161, 174320), (184, 152530), (230, 122024), (280, 100234), (322, 87160), (368, 76265), (460, 61012), (560, 50117), (644, 43580), (805, 34864), (920, 30506), (1288, 21790), (1610, 17432), (1840, 15253), (2179, 12880), (2576, 10895), (3220, 8716), (4358, 6440)]