21110205

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1423}}^1$

素因数の和:1497

約数の個数: 32

約数和(自身を含む): 36089856

約数和(自身を除く): 14979651

約数列:

[1, 3, 5, 15, 23, 43, 69, 115, 129, 215, 345, 645, 989, 1423, 2967, 4269, 4945, 7115, 14835, 21345, 32729, 61189, 98187, 163645, 183567, 305945, 490935, 917835, 1407347, 4222041, 7036735, 21110205]

約数ペア:

[(1, 21110205), (3, 7036735), (5, 4222041), (15, 1407347), (23, 917835), (43, 490935), (69, 305945), (115, 183567), (129, 163645), (215, 98187), (345, 61189), (645, 32729), (989, 21345), (1423, 14835), (2967, 7115), (4269, 4945)]