20645877

素因数分解:

$3^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1$

素因数の和:369

約数の個数: 32

約数和(自身を含む): 32569344

約数和(自身を除く): 11923467

約数列:

[1, 3, 7, 21, 61, 71, 183, 213, 227, 427, 497, 681, 1281, 1491, 1589, 4331, 4767, 12993, 13847, 16117, 30317, 41541, 48351, 90951, 96929, 112819, 290787, 338457, 983137, 2949411, 6881959, 20645877]

約数ペア:

[(1, 20645877), (3, 6881959), (7, 2949411), (21, 983137), (61, 338457), (71, 290787), (183, 112819), (213, 96929), (227, 90951), (427, 48351), (497, 41541), (681, 30317), (1281, 16117), (1491, 13847), (1589, 12993), (4331, 4767)]