19916120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71129}}^1$

素因数の和:71147

約数の個数: 32

約数和(自身を含む): 51213600

約数和(自身を除く): 31297480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 71129, 142258, 284516, 355645, 497903, 569032, 711290, 995806, 1422580, 1991612, 2489515, 2845160, 3983224, 4979030, 9958060, 19916120]

約数ペア:

[(1, 19916120), (2, 9958060), (4, 4979030), (5, 3983224), (7, 2845160), (8, 2489515), (10, 1991612), (14, 1422580), (20, 995806), (28, 711290), (35, 569032), (40, 497903), (56, 355645), (70, 284516), (140, 142258), (280, 71129)]