19928540

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{12613}}^1$

素因数の和:12701

約数の個数: 24

約数和(自身を含む): 42383040

約数和(自身を除く): 22454500

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 12613, 25226, 50452, 63065, 126130, 252260, 996427, 1992854, 3985708, 4982135, 9964270, 19928540]

約数ペア:

[(1, 19928540), (2, 9964270), (4, 4982135), (5, 3985708), (10, 1992854), (20, 996427), (79, 252260), (158, 126130), (316, 63065), (395, 50452), (790, 25226), (1580, 12613)]