20288020

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{113}}^1\times {\mathrm{191}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 44126208

約数和(自身を除く): 23838188

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 113, 188, 191, 226, 235, 382, 452, 470, 565, 764, 940, 955, 1130, 1910, 2260, 3820, 5311, 8977, 10622, 17954, 21244, 21583, 26555, 35908, 43166, 44885, 53110, 86332, 89770, 106220, 107915, 179540, 215830, 431660, 1014401, 2028802, 4057604, 5072005, 10144010, 20288020]

約数ペア:

[(1, 20288020), (2, 10144010), (4, 5072005), (5, 4057604), (10, 2028802), (20, 1014401), (47, 431660), (94, 215830), (113, 179540), (188, 107915), (191, 106220), (226, 89770), (235, 86332), (382, 53110), (452, 44885), (470, 43166), (565, 35908), (764, 26555), (940, 21583), (955, 21244), (1130, 17954), (1910, 10622), (2260, 8977), (3820, 5311)]