20515673913

素因数分解:

$3^1\times 7^1\times {\mathrm{6971}}^1\times {\mathrm{140143}}^1$

素因数の和:147124

約数の個数: 16

約数和(自身を含む): 31266686976

約数和(自身を除く): 10751013063

約数列:

[1, 3, 7, 21, 6971, 20913, 48797, 140143, 146391, 420429, 981001, 2943003, 976936853, 2930810559, 6838557971, 20515673913]

約数ペア:

[(1, 20515673913), (3, 6838557971), (7, 2930810559), (21, 976936853), (6971, 2943003), (20913, 981001), (48797, 420429), (140143, 146391)]