20820440

素因数分解:

$2^3\times 5^1\times {\mathrm{227}}^1\times {\mathrm{2293}}^1$

素因数の和:2531

約数の個数: 32

約数和(自身を含む): 47072880

約数和(自身を除く): 26252440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 227, 454, 908, 1135, 1816, 2270, 2293, 4540, 4586, 9080, 9172, 11465, 18344, 22930, 45860, 91720, 520511, 1041022, 2082044, 2602555, 4164088, 5205110, 10410220, 20820440]

約数ペア:

[(1, 20820440), (2, 10410220), (4, 5205110), (5, 4164088), (8, 2602555), (10, 2082044), (20, 1041022), (40, 520511), (227, 91720), (454, 45860), (908, 22930), (1135, 18344), (1816, 11465), (2270, 9172), (2293, 9080), (4540, 4586)]