21990430

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{28559}}^1$

素因数の和:28584

約数の個数: 32

約数和(自身を含む): 49351680

約数和(自身を除く): 27361250

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 154, 385, 770, 28559, 57118, 142795, 199913, 285590, 314149, 399826, 628298, 999565, 1570745, 1999130, 2199043, 3141490, 4398086, 10995215, 21990430]

約数ペア:

[(1, 21990430), (2, 10995215), (5, 4398086), (7, 3141490), (10, 2199043), (11, 1999130), (14, 1570745), (22, 999565), (35, 628298), (55, 399826), (70, 314149), (77, 285590), (110, 199913), (154, 142795), (385, 57118), (770, 28559)]