21960010

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{2819}}^1$

素因数の和:2886

約数の個数: 32

約数和(自身を含む): 42638400

約数和(自身を除く): 20678390

約数列:

[1, 2, 5, 10, 19, 38, 41, 82, 95, 190, 205, 410, 779, 1558, 2819, 3895, 5638, 7790, 14095, 28190, 53561, 107122, 115579, 231158, 267805, 535610, 577895, 1155790, 2196001, 4392002, 10980005, 21960010]

約数ペア:

[(1, 21960010), (2, 10980005), (5, 4392002), (10, 2196001), (19, 1155790), (38, 577895), (41, 535610), (82, 267805), (95, 231158), (190, 115579), (205, 107122), (410, 53561), (779, 28190), (1558, 14095), (2819, 7790), (3895, 5638)]