21003495

素因数分解:

$3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{20899}}^1$

素因数の和:20974

約数の個数: 16

約数和(自身を含む): 34108800

約数和(自身を除く): 13105305

約数列:

[1, 3, 5, 15, 67, 201, 335, 1005, 20899, 62697, 104495, 313485, 1400233, 4200699, 7001165, 21003495]

約数ペア:

[(1, 21003495), (3, 7001165), (5, 4200699), (15, 1400233), (67, 313485), (201, 104495), (335, 62697), (1005, 20899)]