21270423

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{107}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 31021056

約数和(自身を除く): 9750633

約数列:

[1, 3, 23, 43, 67, 69, 107, 129, 201, 321, 989, 1541, 2461, 2881, 2967, 4601, 4623, 7169, 7383, 8643, 13803, 21507, 66263, 105823, 164887, 198789, 308267, 317469, 494661, 924801, 7090141, 21270423]

約数ペア:

[(1, 21270423), (3, 7090141), (23, 924801), (43, 494661), (67, 317469), (69, 308267), (107, 198789), (129, 164887), (201, 105823), (321, 66263), (989, 21507), (1541, 13803), (2461, 8643), (2881, 7383), (2967, 7169), (4601, 4623)]