19992490

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{40801}}^1$

素因数の和:40822

約数の個数: 24

約数和(自身を含む): 41862852

約数和(自身を除く): 21870362

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 40801, 81602, 204005, 285607, 408010, 571214, 1428035, 1999249, 2856070, 3998498, 9996245, 19992490]

約数ペア:

[(1, 19992490), (2, 9996245), (5, 3998498), (7, 2856070), (10, 1999249), (14, 1428035), (35, 571214), (49, 408010), (70, 285607), (98, 204005), (245, 81602), (490, 40801)]