21230020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{151643}}^1$

素因数の和:151659

約数の個数: 24

約数和(自身を含む): 50952384

約数和(自身を除く): 29722364

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151643, 303286, 606572, 758215, 1061501, 1516430, 2123002, 3032860, 4246004, 5307505, 10615010, 21230020]

約数ペア:

[(1, 21230020), (2, 10615010), (4, 5307505), (5, 4246004), (7, 3032860), (10, 2123002), (14, 1516430), (20, 1061501), (28, 758215), (35, 606572), (70, 303286), (140, 151643)]