640010

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{223}}^1$

素因数の和:278

約数の個数: 32

約数和(自身を含む): 1354752

約数和(自身を除く): 714742

約数列:

[1, 2, 5, 7, 10, 14, 35, 41, 70, 82, 205, 223, 287, 410, 446, 574, 1115, 1435, 1561, 2230, 2870, 3122, 7805, 9143, 15610, 18286, 45715, 64001, 91430, 128002, 320005, 640010]

約数ペア:

[(1, 640010), (2, 320005), (5, 128002), (7, 91430), (10, 64001), (14, 45715), (35, 18286), (41, 15610), (70, 9143), (82, 7805), (205, 3122), (223, 2870), (287, 2230), (410, 1561), (446, 1435), (574, 1115)]