21258215

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{307}}^1\times {\mathrm{1259}}^1$

素因数の和:1582

約数の個数: 16

約数和(自身を含む): 27941760

約数和(自身を除く): 6683545

約数列:

[1, 5, 11, 55, 307, 1259, 1535, 3377, 6295, 13849, 16885, 69245, 386513, 1932565, 4251643, 21258215]

約数ペア:

[(1, 21258215), (5, 4251643), (11, 1932565), (55, 386513), (307, 69245), (1259, 16885), (1535, 13849), (3377, 6295)]