640430

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{1307}}^1$

素因数の和:1328

約数の個数: 24

約数和(自身を含む): 1342008

約数和(自身を除く): 701578

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 1307, 2614, 6535, 9149, 13070, 18298, 45745, 64043, 91490, 128086, 320215, 640430]

約数ペア:

[(1, 640430), (2, 320215), (5, 128086), (7, 91490), (10, 64043), (14, 45745), (35, 18298), (49, 13070), (70, 9149), (98, 6535), (245, 2614), (490, 1307)]