21517768

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{137}}^1\times {\mathrm{677}}^1$

素因数の和:849

約数の個数: 32

約数和(自身を含む): 42103800

約数和(自身を除く): 20586032

約数列:

[1, 2, 4, 8, 29, 58, 116, 137, 232, 274, 548, 677, 1096, 1354, 2708, 3973, 5416, 7946, 15892, 19633, 31784, 39266, 78532, 92749, 157064, 185498, 370996, 741992, 2689721, 5379442, 10758884, 21517768]

約数ペア:

[(1, 21517768), (2, 10758884), (4, 5379442), (8, 2689721), (29, 741992), (58, 370996), (116, 185498), (137, 157064), (232, 92749), (274, 78532), (548, 39266), (677, 31784), (1096, 19633), (1354, 15892), (2708, 7946), (3973, 5416)]