21256335

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6653}}^1$

素因数の和:6735

約数の個数: 24

約数和(自身を含む): 37368864

約数和(自身を除く): 16112529

約数列:

[1, 3, 5, 9, 15, 45, 71, 213, 355, 639, 1065, 3195, 6653, 19959, 33265, 59877, 99795, 299385, 472363, 1417089, 2361815, 4251267, 7085445, 21256335]

約数ペア:

[(1, 21256335), (3, 7085445), (5, 4251267), (9, 2361815), (15, 1417089), (45, 472363), (71, 299385), (213, 99795), (355, 59877), (639, 33265), (1065, 19959), (3195, 6653)]