20724921

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{523}}^1$

素因数の和:590

約数の個数: 48

約数和(自身を含む): 37275264

約数和(自身を除く): 16550343

約数列:

[1, 3, 7, 9, 17, 21, 37, 51, 63, 111, 119, 153, 259, 333, 357, 523, 629, 777, 1071, 1569, 1887, 2331, 3661, 4403, 4707, 5661, 8891, 10983, 13209, 19351, 26673, 32949, 39627, 58053, 62237, 80019, 135457, 174159, 186711, 328967, 406371, 560133, 986901, 1219113, 2302769, 2960703, 6908307, 20724921]

約数ペア:

[(1, 20724921), (3, 6908307), (7, 2960703), (9, 2302769), (17, 1219113), (21, 986901), (37, 560133), (51, 406371), (63, 328967), (111, 186711), (119, 174159), (153, 135457), (259, 80019), (333, 62237), (357, 58053), (523, 39627), (629, 32949), (777, 26673), (1071, 19351), (1569, 13209), (1887, 10983), (2331, 8891), (3661, 5661), (4403, 4707)]