20289080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{72461}}^1$

素因数の和:72479

約数の個数: 32

約数和(自身を含む): 52172640

約数和(自身を除く): 31883560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 72461, 144922, 289844, 362305, 507227, 579688, 724610, 1014454, 1449220, 2028908, 2536135, 2898440, 4057816, 5072270, 10144540, 20289080]

約数ペア:

[(1, 20289080), (2, 10144540), (4, 5072270), (5, 4057816), (7, 2898440), (8, 2536135), (10, 2028908), (14, 1449220), (20, 1014454), (28, 724610), (35, 579688), (40, 507227), (56, 362305), (70, 289844), (140, 144922), (280, 72461)]