20921530

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{42697}}^1$

素因数の和:42718

約数の個数: 24

約数和(自身を含む): 43808148

約数和(自身を除く): 22886618

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 42697, 85394, 213485, 298879, 426970, 597758, 1494395, 2092153, 2988790, 4184306, 10460765, 20921530]

約数ペア:

[(1, 20921530), (2, 10460765), (5, 4184306), (7, 2988790), (10, 2092153), (14, 1494395), (35, 597758), (49, 426970), (70, 298879), (98, 213485), (245, 85394), (490, 42697)]