21721376

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{39929}}^1$

素因数の和:39956

約数の個数: 24

約数和(自身を含む): 45280620

約数和(自身を除く): 23559244

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 68, 136, 272, 544, 39929, 79858, 159716, 319432, 638864, 678793, 1277728, 1357586, 2715172, 5430344, 10860688, 21721376]

約数ペア:

[(1, 21721376), (2, 10860688), (4, 5430344), (8, 2715172), (16, 1357586), (17, 1277728), (32, 678793), (34, 638864), (68, 319432), (136, 159716), (272, 79858), (544, 39929)]