20778718

素因数分解:

$2^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:240

約数の個数: 32

約数和(自身を含む): 33530112

約数和(自身を除く): 12751394

約数列:

[1, 2, 41, 43, 71, 82, 83, 86, 142, 166, 1763, 2911, 3053, 3403, 3526, 3569, 5822, 5893, 6106, 6806, 7138, 11786, 125173, 146329, 241613, 250346, 253399, 292658, 483226, 506798, 10389359, 20778718]

約数ペア:

[(1, 20778718), (2, 10389359), (41, 506798), (43, 483226), (71, 292658), (82, 253399), (83, 250346), (86, 241613), (142, 146329), (166, 125173), (1763, 11786), (2911, 7138), (3053, 6806), (3403, 6106), (3526, 5893), (3569, 5822)]