20218400

素因数分解:

$2^5\times 5^2\times {\mathrm{127}}^1\times {\mathrm{199}}^1$

素因数の和:346

約数の個数: 72

約数和(自身を含む): 49996800

約数和(自身を除く): 29778400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 127, 160, 199, 200, 254, 398, 400, 508, 635, 796, 800, 995, 1016, 1270, 1592, 1990, 2032, 2540, 3175, 3184, 3980, 4064, 4975, 5080, 6350, 6368, 7960, 9950, 10160, 12700, 15920, 19900, 20320, 25273, 25400, 31840, 39800, 50546, 50800, 79600, 101092, 101600, 126365, 159200, 202184, 252730, 404368, 505460, 631825, 808736, 1010920, 1263650, 2021840, 2527300, 4043680, 5054600, 10109200, 20218400]

約数ペア:

[(1, 20218400), (2, 10109200), (4, 5054600), (5, 4043680), (8, 2527300), (10, 2021840), (16, 1263650), (20, 1010920), (25, 808736), (32, 631825), (40, 505460), (50, 404368), (80, 252730), (100, 202184), (127, 159200), (160, 126365), (199, 101600), (200, 101092), (254, 79600), (398, 50800), (400, 50546), (508, 39800), (635, 31840), (796, 25400), (800, 25273), (995, 20320), (1016, 19900), (1270, 15920), (1592, 12700), (1990, 10160), (2032, 9950), (2540, 7960), (3175, 6368), (3184, 6350), (3980, 5080), (4064, 4975)]