20709015

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{331}}^1$

素因数の和:479

約数の個数: 32

約数和(自身を含む): 34358016

約数和(自身を除く): 13649001

約数列:

[1, 3, 5, 15, 43, 97, 129, 215, 291, 331, 485, 645, 993, 1455, 1655, 4171, 4965, 12513, 14233, 20855, 32107, 42699, 62565, 71165, 96321, 160535, 213495, 481605, 1380601, 4141803, 6903005, 20709015]

約数ペア:

[(1, 20709015), (3, 6903005), (5, 4141803), (15, 1380601), (43, 481605), (97, 213495), (129, 160535), (215, 96321), (291, 71165), (331, 62565), (485, 42699), (645, 32107), (993, 20855), (1455, 14233), (1655, 12513), (4171, 4965)]