66721328

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{245299}}^1$

素因数の和:245324

約数の個数: 20

約数和(自身を含む): 136877400

約数和(自身を除く): 70156072

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 245299, 490598, 981196, 1962392, 3924784, 4170083, 8340166, 16680332, 33360664, 66721328]

約数ペア:

[(1, 66721328), (2, 33360664), (4, 16680332), (8, 8340166), (16, 4170083), (17, 3924784), (34, 1962392), (68, 981196), (136, 490598), (272, 245299)]