21490864

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{25343}}^1$

素因数の和:25404

約数の個数: 20

約数和(自身を含む): 42425856

約数和(自身を除く): 20934992

約数列:

[1, 2, 4, 8, 16, 53, 106, 212, 424, 848, 25343, 50686, 101372, 202744, 405488, 1343179, 2686358, 5372716, 10745432, 21490864]

約数ペア:

[(1, 21490864), (2, 10745432), (4, 5372716), (8, 2686358), (16, 1343179), (53, 405488), (106, 202744), (212, 101372), (424, 50686), (848, 25343)]