81806140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{24203}}^1$

素因数の和:24238

約数の個数: 36

約数和(自身を含む): 186031944

約数和(自身を除く): 104225804

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 24203, 48406, 96812, 121015, 242030, 314639, 484060, 629278, 1258556, 1573195, 3146390, 4090307, 6292780, 8180614, 16361228, 20451535, 40903070, 81806140]

約数ペア:

[(1, 81806140), (2, 40903070), (4, 20451535), (5, 16361228), (10, 8180614), (13, 6292780), (20, 4090307), (26, 3146390), (52, 1573195), (65, 1258556), (130, 629278), (169, 484060), (260, 314639), (338, 242030), (676, 121015), (845, 96812), (1690, 48406), (3380, 24203)]