20168260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2029}}^1$

素因数の和:2116

約数の個数: 48

約数和(自身を含む): 49109760

約数和(自身を除く): 28941500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2029, 2485, 4058, 4970, 8116, 9940, 10145, 14203, 20290, 28406, 40580, 56812, 71015, 142030, 144059, 284060, 288118, 576236, 720295, 1008413, 1440590, 2016826, 2881180, 4033652, 5042065, 10084130, 20168260]

約数ペア:

[(1, 20168260), (2, 10084130), (4, 5042065), (5, 4033652), (7, 2881180), (10, 2016826), (14, 1440590), (20, 1008413), (28, 720295), (35, 576236), (70, 288118), (71, 284060), (140, 144059), (142, 142030), (284, 71015), (355, 56812), (497, 40580), (710, 28406), (994, 20290), (1420, 14203), (1988, 10145), (2029, 9940), (2485, 8116), (4058, 4970)]