21011715

素因数分解:

$3^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{2699}}^1$

素因数の和:2883

約数の個数: 24

約数和(自身を含む): 36644400

約数和(自身を除く): 15632685

約数列:

[1, 3, 5, 9, 15, 45, 173, 519, 865, 1557, 2595, 2699, 7785, 8097, 13495, 24291, 40485, 121455, 466927, 1400781, 2334635, 4202343, 7003905, 21011715]

約数ペア:

[(1, 21011715), (3, 7003905), (5, 4202343), (9, 2334635), (15, 1400781), (45, 466927), (173, 121455), (519, 40485), (865, 24291), (1557, 13495), (2595, 8097), (2699, 7785)]