20796880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19997}}^1$

素因数の和:20023

約数の個数: 40

約数和(自身を含む): 52074792

約数和(自身を除く): 31277912

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19997, 39994, 79988, 99985, 159976, 199970, 259961, 319952, 399940, 519922, 799880, 1039844, 1299805, 1599760, 2079688, 2599610, 4159376, 5199220, 10398440, 20796880]

約数ペア:

[(1, 20796880), (2, 10398440), (4, 5199220), (5, 4159376), (8, 2599610), (10, 2079688), (13, 1599760), (16, 1299805), (20, 1039844), (26, 799880), (40, 519922), (52, 399940), (65, 319952), (80, 259961), (104, 199970), (130, 159976), (208, 99985), (260, 79988), (520, 39994), (1040, 19997)]