21263918

素因数分解:

$2^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{1187}}^1$

素因数の和:1268

約数の個数: 24

約数和(自身を含む): 35219448

約数和(自身を除く): 13955530

約数列:

[1, 2, 13, 26, 53, 106, 169, 338, 689, 1187, 1378, 2374, 8957, 15431, 17914, 30862, 62911, 125822, 200603, 401206, 817843, 1635686, 10631959, 21263918]

約数ペア:

[(1, 21263918), (2, 10631959), (13, 1635686), (26, 817843), (53, 401206), (106, 200603), (169, 125822), (338, 62911), (689, 30862), (1187, 17914), (1378, 15431), (2374, 8957)]