21277480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{75991}}^1$

素因数の和:76009

約数の個数: 32

約数和(自身を含む): 54714240

約数和(自身を除く): 33436760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 75991, 151982, 303964, 379955, 531937, 607928, 759910, 1063874, 1519820, 2127748, 2659685, 3039640, 4255496, 5319370, 10638740, 21277480]

約数ペア:

[(1, 21277480), (2, 10638740), (4, 5319370), (5, 4255496), (7, 3039640), (8, 2659685), (10, 2127748), (14, 1519820), (20, 1063874), (28, 759910), (35, 607928), (40, 531937), (56, 379955), (70, 303964), (140, 151982), (280, 75991)]