21279465

素因数分解:

$3^2\times 5^1\times {\mathrm{487}}^1\times {\mathrm{971}}^1$

素因数の和:1469

約数の個数: 24

約数和(自身を含む): 36998208

約数和(自身を除く): 15718743

約数列:

[1, 3, 5, 9, 15, 45, 487, 971, 1461, 2435, 2913, 4383, 4855, 7305, 8739, 14565, 21915, 43695, 472877, 1418631, 2364385, 4255893, 7093155, 21279465]

約数ペア:

[(1, 21279465), (3, 7093155), (5, 4255893), (9, 2364385), (15, 1418631), (45, 472877), (487, 43695), (971, 21915), (1461, 14565), (2435, 8739), (2913, 7305), (4383, 4855)]