21571795

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{401}}^1$

素因数の和:495

約数の個数: 32

約数和(自身を含む): 31259520

約数和(自身を除く): 9687725

約数列:

[1, 5, 7, 29, 35, 53, 145, 203, 265, 371, 401, 1015, 1537, 1855, 2005, 2807, 7685, 10759, 11629, 14035, 21253, 53795, 58145, 81403, 106265, 148771, 407015, 616337, 743855, 3081685, 4314359, 21571795]

約数ペア:

[(1, 21571795), (5, 4314359), (7, 3081685), (29, 743855), (35, 616337), (53, 407015), (145, 148771), (203, 106265), (265, 81403), (371, 58145), (401, 53795), (1015, 21253), (1537, 14035), (1855, 11629), (2005, 10759), (2807, 7685)]