18780018

素因数分解:

$2^1\times 3^1\times {\mathrm{19}}^1\times {\mathrm{257}}^1\times {\mathrm{641}}^1$

素因数の和:922

約数の個数: 32

約数和(自身を含む): 39752640

約数和(自身を除く): 20972622

約数列:

[1, 2, 3, 6, 19, 38, 57, 114, 257, 514, 641, 771, 1282, 1542, 1923, 3846, 4883, 9766, 12179, 14649, 24358, 29298, 36537, 73074, 164737, 329474, 494211, 988422, 3130003, 6260006, 9390009, 18780018]

約数ペア:

[(1, 18780018), (2, 9390009), (3, 6260006), (6, 3130003), (19, 988422), (38, 494211), (57, 329474), (114, 164737), (257, 73074), (514, 36537), (641, 29298), (771, 24358), (1282, 14649), (1542, 12179), (1923, 9766), (3846, 4883)]