27142820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{419}}^1$

素因数の和:548

約数の個数: 48

約数和(自身を含む): 59270400

約数和(自身を除く): 32127580

約数列:

[1, 2, 4, 5, 10, 20, 41, 79, 82, 158, 164, 205, 316, 395, 410, 419, 790, 820, 838, 1580, 1676, 2095, 3239, 4190, 6478, 8380, 12956, 16195, 17179, 32390, 33101, 34358, 64780, 66202, 68716, 85895, 132404, 165505, 171790, 331010, 343580, 662020, 1357141, 2714282, 5428564, 6785705, 13571410, 27142820]

約数ペア:

[(1, 27142820), (2, 13571410), (4, 6785705), (5, 5428564), (10, 2714282), (20, 1357141), (41, 662020), (79, 343580), (82, 331010), (158, 171790), (164, 165505), (205, 132404), (316, 85895), (395, 68716), (410, 66202), (419, 64780), (790, 34358), (820, 33101), (838, 32390), (1580, 17179), (1676, 16195), (2095, 12956), (3239, 8380), (4190, 6478)]