18321289

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{107}}^1\times {\mathrm{401}}^1$

素因数の和:576

約数の個数: 16

約数和(自身を含む): 21534336

約数和(自身を除く): 3213047

約数列:

[1, 7, 61, 107, 401, 427, 749, 2807, 6527, 24461, 42907, 45689, 171227, 300349, 2617327, 18321289]

約数ペア:

[(1, 18321289), (7, 2617327), (61, 300349), (107, 171227), (401, 45689), (427, 42907), (749, 24461), (2807, 6527)]