21456260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{153259}}^1$

素因数の和:153275

約数の個数: 24

約数和(自身を含む): 51495360

約数和(自身を除く): 30039100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 153259, 306518, 613036, 766295, 1072813, 1532590, 2145626, 3065180, 4291252, 5364065, 10728130, 21456260]

約数ペア:

[(1, 21456260), (2, 10728130), (4, 5364065), (5, 4291252), (7, 3065180), (10, 2145626), (14, 1532590), (20, 1072813), (28, 766295), (35, 613036), (70, 306518), (140, 153259)]