18978544

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{91243}}^1$

素因数の和:91264

約数の個数: 20

約数和(自身を含む): 39599896

約数和(自身を除く): 20621352

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 91243, 182486, 364972, 729944, 1186159, 1459888, 2372318, 4744636, 9489272, 18978544]

約数ペア:

[(1, 18978544), (2, 9489272), (4, 4744636), (8, 2372318), (13, 1459888), (16, 1186159), (26, 729944), (52, 364972), (104, 182486), (208, 91243)]