18992240

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5521}}^1$

素因数の和:5577

約数の個数: 40

約数和(自身を含む): 45192048

約数和(自身を除く): 26199808

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5521, 11042, 22084, 27605, 44168, 55210, 88336, 110420, 220840, 237403, 441680, 474806, 949612, 1187015, 1899224, 2374030, 3798448, 4748060, 9496120, 18992240]

約数ペア:

[(1, 18992240), (2, 9496120), (4, 4748060), (5, 3798448), (8, 2374030), (10, 1899224), (16, 1187015), (20, 949612), (40, 474806), (43, 441680), (80, 237403), (86, 220840), (172, 110420), (215, 88336), (344, 55210), (430, 44168), (688, 27605), (860, 22084), (1720, 11042), (3440, 5521)]