21784497

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{439}}^1$

素因数の和:605

約数の個数: 32

約数和(自身を含む): 35481600

約数和(自身を除く): 13697103

約数列:

[1, 3, 7, 17, 21, 51, 119, 139, 357, 417, 439, 973, 1317, 2363, 2919, 3073, 7089, 7463, 9219, 16541, 22389, 49623, 52241, 61021, 156723, 183063, 427147, 1037357, 1281441, 3112071, 7261499, 21784497]

約数ペア:

[(1, 21784497), (3, 7261499), (7, 3112071), (17, 1281441), (21, 1037357), (51, 427147), (119, 183063), (139, 156723), (357, 61021), (417, 52241), (439, 49623), (973, 22389), (1317, 16541), (2363, 9219), (2919, 7463), (3073, 7089)]