21280280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76001}}^1$

素因数の和:76019

約数の個数: 32

約数和(自身を含む): 54721440

約数和(自身を除く): 33441160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76001, 152002, 304004, 380005, 532007, 608008, 760010, 1064014, 1520020, 2128028, 2660035, 3040040, 4256056, 5320070, 10640140, 21280280]

約数ペア:

[(1, 21280280), (2, 10640140), (4, 5320070), (5, 4256056), (7, 3040040), (8, 2660035), (10, 2128028), (14, 1520020), (20, 1064014), (28, 760010), (35, 608008), (40, 532007), (56, 380005), (70, 304004), (140, 152002), (280, 76001)]