21881584

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{80447}}^1$

素因数の和:80472

約数の個数: 20

約数和(自身を含む): 44889984

約数和(自身を除く): 23008400

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 80447, 160894, 321788, 643576, 1287152, 1367599, 2735198, 5470396, 10940792, 21881584]

約数ペア:

[(1, 21881584), (2, 10940792), (4, 5470396), (8, 2735198), (16, 1367599), (17, 1287152), (34, 643576), (68, 321788), (136, 160894), (272, 80447)]