18918305

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{331}}^1$

素因数の和:437

約数の個数: 32

約数和(自身を含む): 27537408

約数和(自身を除く): 8619103

約数列:

[1, 5, 7, 23, 35, 71, 115, 161, 331, 355, 497, 805, 1633, 1655, 2317, 2485, 7613, 8165, 11431, 11585, 23501, 38065, 53291, 57155, 117505, 164507, 266455, 540523, 822535, 2702615, 3783661, 18918305]

約数ペア:

[(1, 18918305), (5, 3783661), (7, 2702615), (23, 822535), (35, 540523), (71, 266455), (115, 164507), (161, 117505), (331, 57155), (355, 53291), (497, 38065), (805, 23501), (1633, 11585), (1655, 11431), (2317, 8165), (2485, 7613)]