21154256

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77773}}^1$

素因数の和:77798

約数の個数: 20

約数和(自身を含む): 43397892

約数和(自身を除く): 22243636

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77773, 155546, 311092, 622184, 1244368, 1322141, 2644282, 5288564, 10577128, 21154256]

約数ペア:

[(1, 21154256), (2, 10577128), (4, 5288564), (8, 2644282), (16, 1322141), (17, 1244368), (34, 622184), (68, 311092), (136, 155546), (272, 77773)]