20631285

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{181}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 38329200

約数和(自身を除く): 17697915

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 149, 153, 181, 255, 447, 543, 745, 765, 905, 1341, 1629, 2235, 2533, 2715, 3077, 6705, 7599, 8145, 9231, 12665, 15385, 22797, 26969, 27693, 37995, 46155, 80907, 113985, 134845, 138465, 242721, 404535, 458473, 1213605, 1375419, 2292365, 4126257, 6877095, 20631285]

約数ペア:

[(1, 20631285), (3, 6877095), (5, 4126257), (9, 2292365), (15, 1375419), (17, 1213605), (45, 458473), (51, 404535), (85, 242721), (149, 138465), (153, 134845), (181, 113985), (255, 80907), (447, 46155), (543, 37995), (745, 27693), (765, 26969), (905, 22797), (1341, 15385), (1629, 12665), (2235, 9231), (2533, 8145), (2715, 7599), (3077, 6705)]