17781940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{617}}^1$

素因数の和:768

約数の個数: 48

約数和(自身を含む): 41114304

約数和(自身を除く): 23332364

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 131, 220, 262, 524, 617, 655, 1234, 1310, 1441, 2468, 2620, 2882, 3085, 5764, 6170, 6787, 7205, 12340, 13574, 14410, 27148, 28820, 33935, 67870, 80827, 135740, 161654, 323308, 404135, 808270, 889097, 1616540, 1778194, 3556388, 4445485, 8890970, 17781940]

約数ペア:

[(1, 17781940), (2, 8890970), (4, 4445485), (5, 3556388), (10, 1778194), (11, 1616540), (20, 889097), (22, 808270), (44, 404135), (55, 323308), (110, 161654), (131, 135740), (220, 80827), (262, 67870), (524, 33935), (617, 28820), (655, 27148), (1234, 14410), (1310, 13574), (1441, 12340), (2468, 7205), (2620, 6787), (2882, 6170), (3085, 5764)]