19721037

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{1493}}^1$

素因数の和:1557

約数の個数: 32

約数和(自身を含む): 32700672

約数和(自身を除く): 12979635

約数列:

[1, 3, 7, 17, 21, 37, 51, 111, 119, 259, 357, 629, 777, 1493, 1887, 4403, 4479, 10451, 13209, 25381, 31353, 55241, 76143, 165723, 177667, 386687, 533001, 939097, 1160061, 2817291, 6573679, 19721037]

約数ペア:

[(1, 19721037), (3, 6573679), (7, 2817291), (17, 1160061), (21, 939097), (37, 533001), (51, 386687), (111, 177667), (119, 165723), (259, 76143), (357, 55241), (629, 31353), (777, 25381), (1493, 13209), (1887, 10451), (4403, 4479)]