87731980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{3181}}^1$

素因数の和:3394

約数の個数: 48

約数和(自身を含む): 211692096

約数和(自身を除く): 123960116

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 197, 394, 788, 985, 1379, 1970, 2758, 3181, 3940, 5516, 6362, 6895, 12724, 13790, 15905, 22267, 27580, 31810, 44534, 63620, 89068, 111335, 222670, 445340, 626657, 1253314, 2506628, 3133285, 4386599, 6266570, 8773198, 12533140, 17546396, 21932995, 43865990, 87731980]

約数ペア:

[(1, 87731980), (2, 43865990), (4, 21932995), (5, 17546396), (7, 12533140), (10, 8773198), (14, 6266570), (20, 4386599), (28, 3133285), (35, 2506628), (70, 1253314), (140, 626657), (197, 445340), (394, 222670), (788, 111335), (985, 89068), (1379, 63620), (1970, 44534), (2758, 31810), (3181, 27580), (3940, 22267), (5516, 15905), (6362, 13790), (6895, 12724)]