19978808

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{3583}}^1$

素因数の和:3647

約数の個数: 32

約数和(自身を含む): 40642560

約数和(自身を除く): 20663752

約数列:

[1, 2, 4, 8, 17, 34, 41, 68, 82, 136, 164, 328, 697, 1394, 2788, 3583, 5576, 7166, 14332, 28664, 60911, 121822, 146903, 243644, 293806, 487288, 587612, 1175224, 2497351, 4994702, 9989404, 19978808]

約数ペア:

[(1, 19978808), (2, 9989404), (4, 4994702), (8, 2497351), (17, 1175224), (34, 587612), (41, 487288), (68, 293806), (82, 243644), (136, 146903), (164, 121822), (328, 60911), (697, 28664), (1394, 14332), (2788, 7166), (3583, 5576)]