20574820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{281}}^1\times {\mathrm{523}}^1$

素因数の和:820

約数の個数: 48

約数和(自身を含む): 49650048

約数和(自身を除く): 29075228

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 281, 523, 562, 1046, 1124, 1405, 1967, 2092, 2615, 2810, 3661, 3934, 5230, 5620, 7322, 7868, 9835, 10460, 14644, 18305, 19670, 36610, 39340, 73220, 146963, 293926, 587852, 734815, 1028741, 1469630, 2057482, 2939260, 4114964, 5143705, 10287410, 20574820]

約数ペア:

[(1, 20574820), (2, 10287410), (4, 5143705), (5, 4114964), (7, 2939260), (10, 2057482), (14, 1469630), (20, 1028741), (28, 734815), (35, 587852), (70, 293926), (140, 146963), (281, 73220), (523, 39340), (562, 36610), (1046, 19670), (1124, 18305), (1405, 14644), (1967, 10460), (2092, 9835), (2615, 7868), (2810, 7322), (3661, 5620), (3934, 5230)]