21093328

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77549}}^1$

素因数の和:77574

約数の個数: 20

約数和(自身を含む): 43272900

約数和(自身を除く): 22179572

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77549, 155098, 310196, 620392, 1240784, 1318333, 2636666, 5273332, 10546664, 21093328]

約数ペア:

[(1, 21093328), (2, 10546664), (4, 5273332), (8, 2636666), (16, 1318333), (17, 1240784), (34, 620392), (68, 310196), (136, 155098), (272, 77549)]