639921065

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{25643}}^1$

素因数の和:25709

約数の個数: 32

約数和(自身を含む): 945340416

約数和(自身を除く): 305419351

約数列:

[1, 5, 7, 23, 31, 35, 115, 155, 161, 217, 713, 805, 1085, 3565, 4991, 24955, 25643, 128215, 179501, 589789, 794933, 897505, 2948945, 3974665, 4128523, 5564531, 18283459, 20642615, 27822655, 91417295, 127984213, 639921065]

約数ペア:

[(1, 639921065), (5, 127984213), (7, 91417295), (23, 27822655), (31, 20642615), (35, 18283459), (115, 5564531), (155, 4128523), (161, 3974665), (217, 2948945), (713, 897505), (805, 794933), (1085, 589789), (3565, 179501), (4991, 128215), (24955, 25643)]