21491740

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{63211}}^1$

素因数の和:63237

約数の個数: 24

約数和(自身を含む): 47788272

約数和(自身を除く): 26296532

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 63211, 126422, 252844, 316055, 632110, 1074587, 1264220, 2149174, 4298348, 5372935, 10745870, 21491740]

約数ペア:

[(1, 21491740), (2, 10745870), (4, 5372935), (5, 4298348), (10, 2149174), (17, 1264220), (20, 1074587), (34, 632110), (68, 316055), (85, 252844), (170, 126422), (340, 63211)]