21278811

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{3617}}^1$

素因数の和:3710

約数の個数: 16

約数和(自身を含む): 29696544

約数和(自身を除く): 8417733

約数列:

[1, 3, 37, 53, 111, 159, 1961, 3617, 5883, 10851, 133829, 191701, 401487, 575103, 7092937, 21278811]

約数ペア:

[(1, 21278811), (3, 7092937), (37, 575103), (53, 401487), (111, 191701), (159, 133829), (1961, 10851), (3617, 5883)]