19877480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{70991}}^1$

素因数の和:71009

約数の個数: 32

約数和(自身を含む): 51114240

約数和(自身を除く): 31236760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 70991, 141982, 283964, 354955, 496937, 567928, 709910, 993874, 1419820, 1987748, 2484685, 2839640, 3975496, 4969370, 9938740, 19877480]

約数ペア:

[(1, 19877480), (2, 9938740), (4, 4969370), (5, 3975496), (7, 2839640), (8, 2484685), (10, 1987748), (14, 1419820), (20, 993874), (28, 709910), (35, 567928), (40, 496937), (56, 354955), (70, 283964), (140, 141982), (280, 70991)]