19928643

素因数分解:

$3^1\times 7^3\times {\mathrm{107}}^1\times {\mathrm{181}}^1$

素因数の和:312

約数の個数: 32

約数和(自身を含む): 31449600

約数和(自身を除く): 11520957

約数列:

[1, 3, 7, 21, 49, 107, 147, 181, 321, 343, 543, 749, 1029, 1267, 2247, 3801, 5243, 8869, 15729, 19367, 26607, 36701, 58101, 62083, 110103, 135569, 186249, 406707, 948983, 2846949, 6642881, 19928643]

約数ペア:

[(1, 19928643), (3, 6642881), (7, 2846949), (21, 948983), (49, 406707), (107, 186249), (147, 135569), (181, 110103), (321, 62083), (343, 58101), (543, 36701), (749, 26607), (1029, 19367), (1267, 15729), (2247, 8869), (3801, 5243)]