21219723

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19813}}^1$

素因数の和:19843

約数の個数: 24

約数和(自身を含む): 37091808

約数和(自身を除く): 15872085

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 19813, 59439, 138691, 178317, 336821, 416073, 1010463, 1248219, 2357747, 3031389, 7073241, 21219723]

約数ペア:

[(1, 21219723), (3, 7073241), (7, 3031389), (9, 2357747), (17, 1248219), (21, 1010463), (51, 416073), (63, 336821), (119, 178317), (153, 138691), (357, 59439), (1071, 19813)]