21475811

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{251}}^1\times {\mathrm{719}}^1$

素因数の和:994

約数の個数: 16

約数和(自身を含む): 26127360

約数和(自身を除く): 4651549

約数列:

[1, 7, 17, 119, 251, 719, 1757, 4267, 5033, 12223, 29869, 85561, 180469, 1263283, 3067973, 21475811]

約数ペア:

[(1, 21475811), (7, 3067973), (17, 1263283), (119, 180469), (251, 85561), (719, 29869), (1757, 12223), (4267, 5033)]