19661200

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1$

素因数の和:249

約数の個数: 120

約数和(自身を含む): 53816000

約数和(自身を除く): 34154800

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 25, 26, 38, 40, 50, 52, 65, 76, 80, 95, 100, 104, 130, 152, 190, 199, 200, 208, 247, 260, 304, 325, 380, 398, 400, 475, 494, 520, 650, 760, 796, 950, 988, 995, 1040, 1235, 1300, 1520, 1592, 1900, 1976, 1990, 2470, 2587, 2600, 3184, 3781, 3800, 3952, 3980, 4940, 4975, 5174, 5200, 6175, 7562, 7600, 7960, 9880, 9950, 10348, 12350, 12935, 15124, 15920, 18905, 19760, 19900, 20696, 24700, 25870, 30248, 37810, 39800, 41392, 49153, 49400, 51740, 60496, 64675, 75620, 79600, 94525, 98306, 98800, 103480, 129350, 151240, 189050, 196612, 206960, 245765, 258700, 302480, 378100, 393224, 491530, 517400, 756200, 786448, 983060, 1034800, 1228825, 1512400, 1966120, 2457650, 3932240, 4915300, 9830600, 19661200]

約数ペア:

[(1, 19661200), (2, 9830600), (4, 4915300), (5, 3932240), (8, 2457650), (10, 1966120), (13, 1512400), (16, 1228825), (19, 1034800), (20, 983060), (25, 786448), (26, 756200), (38, 517400), (40, 491530), (50, 393224), (52, 378100), (65, 302480), (76, 258700), (80, 245765), (95, 206960), (100, 196612), (104, 189050), (130, 151240), (152, 129350), (190, 103480), (199, 98800), (200, 98306), (208, 94525), (247, 79600), (260, 75620), (304, 64675), (325, 60496), (380, 51740), (398, 49400), (400, 49153), (475, 41392), (494, 39800), (520, 37810), (650, 30248), (760, 25870), (796, 24700), (950, 20696), (988, 19900), (995, 19760), (1040, 18905), (1235, 15920), (1300, 15124), (1520, 12935), (1592, 12350), (1900, 10348), (1976, 9950), (1990, 9880), (2470, 7960), (2587, 7600), (2600, 7562), (3184, 6175), (3781, 5200), (3800, 5174), (3952, 4975), (3980, 4940)]