21991480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{78541}}^1$

素因数の和:78559

約数の個数: 32

約数和(自身を含む): 56550240

約数和(自身を除く): 34558760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 78541, 157082, 314164, 392705, 549787, 628328, 785410, 1099574, 1570820, 2199148, 2748935, 3141640, 4398296, 5497870, 10995740, 21991480]

約数ペア:

[(1, 21991480), (2, 10995740), (4, 5497870), (5, 4398296), (7, 3141640), (8, 2748935), (10, 2199148), (14, 1570820), (20, 1099574), (28, 785410), (35, 628328), (40, 549787), (56, 392705), (70, 314164), (140, 157082), (280, 78541)]