213487905

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{479}}^1\times {\mathrm{691}}^1$

素因数の和:1221

約数の個数: 32

約数和(自身を含む): 350760960

約数和(自身を除く): 137273055

約数列:

[1, 3, 5, 15, 43, 129, 215, 479, 645, 691, 1437, 2073, 2395, 3455, 7185, 10365, 20597, 29713, 61791, 89139, 102985, 148565, 308955, 330989, 445695, 992967, 1654945, 4964835, 14232527, 42697581, 71162635, 213487905]

約数ペア:

[(1, 213487905), (3, 71162635), (5, 42697581), (15, 14232527), (43, 4964835), (129, 1654945), (215, 992967), (479, 445695), (645, 330989), (691, 308955), (1437, 148565), (2073, 102985), (2395, 89139), (3455, 61791), (7185, 29713), (10365, 20597)]