21408304

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{78707}}^1$

素因数の和:78732

約数の個数: 20

約数和(自身を含む): 43919064

約数和(自身を除く): 22510760

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 78707, 157414, 314828, 629656, 1259312, 1338019, 2676038, 5352076, 10704152, 21408304]

約数ペア:

[(1, 21408304), (2, 10704152), (4, 5352076), (8, 2676038), (16, 1338019), (17, 1259312), (34, 629656), (68, 314828), (136, 157414), (272, 78707)]