21269398

素因数分解:

$2^1\times {\mathrm{19}}^2\times {\mathrm{89}}^1\times {\mathrm{331}}^1$

素因数の和:460

約数の個数: 24

約数和(自身を含む): 34152840

約数和(自身を除く): 12883442

約数列:

[1, 2, 19, 38, 89, 178, 331, 361, 662, 722, 1691, 3382, 6289, 12578, 29459, 32129, 58918, 64258, 119491, 238982, 559721, 1119442, 10634699, 21269398]

約数ペア:

[(1, 21269398), (2, 10634699), (19, 1119442), (38, 559721), (89, 238982), (178, 119491), (331, 64258), (361, 58918), (662, 32129), (722, 29459), (1691, 12578), (3382, 6289)]