21887740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1979}}^1$

素因数の和:2074

約数の個数: 48

約数和(自身を含む): 53222400

約数和(自身を除く): 31334660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 79, 140, 158, 316, 395, 553, 790, 1106, 1580, 1979, 2212, 2765, 3958, 5530, 7916, 9895, 11060, 13853, 19790, 27706, 39580, 55412, 69265, 138530, 156341, 277060, 312682, 625364, 781705, 1094387, 1563410, 2188774, 3126820, 4377548, 5471935, 10943870, 21887740]

約数ペア:

[(1, 21887740), (2, 10943870), (4, 5471935), (5, 4377548), (7, 3126820), (10, 2188774), (14, 1563410), (20, 1094387), (28, 781705), (35, 625364), (70, 312682), (79, 277060), (140, 156341), (158, 138530), (316, 69265), (395, 55412), (553, 39580), (790, 27706), (1106, 19790), (1580, 13853), (1979, 11060), (2212, 9895), (2765, 7916), (3958, 5530)]