21315147

素因数分解:

$3^1\times 7^2\times {\mathrm{83}}^1\times {\mathrm{1747}}^1$

素因数の和:1847

約数の個数: 24

約数和(自身を含む): 33477696

約数和(自身を除く): 12162549

約数列:

[1, 3, 7, 21, 49, 83, 147, 249, 581, 1743, 1747, 4067, 5241, 12201, 12229, 36687, 85603, 145001, 256809, 435003, 1015007, 3045021, 7105049, 21315147]

約数ペア:

[(1, 21315147), (3, 7105049), (7, 3045021), (21, 1015007), (49, 435003), (83, 256809), (147, 145001), (249, 85603), (581, 36687), (1743, 12229), (1747, 12201), (4067, 5241)]