20686071

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{337}}^1$

素因数の和:463

約数の個数: 32

約数和(自身を含む): 32880640

約数和(自身を除く): 12194569

約数列:

[1, 3, 7, 21, 37, 79, 111, 237, 259, 337, 553, 777, 1011, 1659, 2359, 2923, 7077, 8769, 12469, 20461, 26623, 37407, 61383, 79869, 87283, 186361, 261849, 559083, 985051, 2955153, 6895357, 20686071]

約数ペア:

[(1, 20686071), (3, 6895357), (7, 2955153), (21, 985051), (37, 559083), (79, 261849), (111, 186361), (237, 87283), (259, 79869), (337, 61383), (553, 37407), (777, 26623), (1011, 20461), (1659, 12469), (2359, 8769), (2923, 7077)]