21515812

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{397}}^1\times {\mathrm{797}}^1$

素因数の和:1215

約数の個数: 24

約数和(自身を含む): 40018104

約数和(自身を除く): 18502292

約数列:

[1, 2, 4, 17, 34, 68, 397, 794, 797, 1588, 1594, 3188, 6749, 13498, 13549, 26996, 27098, 54196, 316409, 632818, 1265636, 5378953, 10757906, 21515812]

約数ペア:

[(1, 21515812), (2, 10757906), (4, 5378953), (17, 1265636), (34, 632818), (68, 316409), (397, 54196), (794, 27098), (797, 26996), (1588, 13549), (1594, 13498), (3188, 6749)]