28770220

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 62092800

約数和(自身を除く): 33322580

約数列:

[1, 2, 4, 5, 10, 20, 79, 131, 139, 158, 262, 278, 316, 395, 524, 556, 655, 695, 790, 1310, 1390, 1580, 2620, 2780, 10349, 10981, 18209, 20698, 21962, 36418, 41396, 43924, 51745, 54905, 72836, 91045, 103490, 109810, 182090, 206980, 219620, 364180, 1438511, 2877022, 5754044, 7192555, 14385110, 28770220]

約数ペア:

[(1, 28770220), (2, 14385110), (4, 7192555), (5, 5754044), (10, 2877022), (20, 1438511), (79, 364180), (131, 219620), (139, 206980), (158, 182090), (262, 109810), (278, 103490), (316, 91045), (395, 72836), (524, 54905), (556, 51745), (655, 43924), (695, 41396), (790, 36418), (1310, 21962), (1390, 20698), (1580, 18209), (2620, 10981), (2780, 10349)]