21516368

素因数分解:

$2^4\times {\mathrm{389}}^1\times {\mathrm{3457}}^1$

素因数の和:3854

約数の個数: 20

約数和(自身を含む): 41807220

約数和(自身を除く): 20290852

約数列:

[1, 2, 4, 8, 16, 389, 778, 1556, 3112, 3457, 6224, 6914, 13828, 27656, 55312, 1344773, 2689546, 5379092, 10758184, 21516368]

約数ペア:

[(1, 21516368), (2, 10758184), (4, 5379092), (8, 2689546), (16, 1344773), (389, 55312), (778, 27656), (1556, 13828), (3112, 6914), (3457, 6224)]