19994480

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{22721}}^1$

素因数の和:22745

約数の個数: 40

約数和(自身を含む): 50715504

約数和(自身を除く): 30721024

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 22721, 45442, 90884, 113605, 181768, 227210, 249931, 363536, 454420, 499862, 908840, 999724, 1249655, 1817680, 1999448, 2499310, 3998896, 4998620, 9997240, 19994480]

約数ペア:

[(1, 19994480), (2, 9997240), (4, 4998620), (5, 3998896), (8, 2499310), (10, 1999448), (11, 1817680), (16, 1249655), (20, 999724), (22, 908840), (40, 499862), (44, 454420), (55, 363536), (80, 249931), (88, 227210), (110, 181768), (176, 113605), (220, 90884), (440, 45442), (880, 22721)]