19720080

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{449}}^1$

素因数の和:529

約数の個数: 120

約数和(自身を含む): 67462200

約数和(自身を除く): 47742120

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 61, 72, 80, 90, 120, 122, 144, 180, 183, 240, 244, 305, 360, 366, 449, 488, 549, 610, 720, 732, 898, 915, 976, 1098, 1220, 1347, 1464, 1796, 1830, 2196, 2245, 2440, 2694, 2745, 2928, 3592, 3660, 4041, 4392, 4490, 4880, 5388, 5490, 6735, 7184, 7320, 8082, 8784, 8980, 10776, 10980, 13470, 14640, 16164, 17960, 20205, 21552, 21960, 26940, 27389, 32328, 35920, 40410, 43920, 53880, 54778, 64656, 80820, 82167, 107760, 109556, 136945, 161640, 164334, 219112, 246501, 273890, 323280, 328668, 410835, 438224, 493002, 547780, 657336, 821670, 986004, 1095560, 1232505, 1314672, 1643340, 1972008, 2191120, 2465010, 3286680, 3944016, 4930020, 6573360, 9860040, 19720080]

約数ペア:

[(1, 19720080), (2, 9860040), (3, 6573360), (4, 4930020), (5, 3944016), (6, 3286680), (8, 2465010), (9, 2191120), (10, 1972008), (12, 1643340), (15, 1314672), (16, 1232505), (18, 1095560), (20, 986004), (24, 821670), (30, 657336), (36, 547780), (40, 493002), (45, 438224), (48, 410835), (60, 328668), (61, 323280), (72, 273890), (80, 246501), (90, 219112), (120, 164334), (122, 161640), (144, 136945), (180, 109556), (183, 107760), (240, 82167), (244, 80820), (305, 64656), (360, 54778), (366, 53880), (449, 43920), (488, 40410), (549, 35920), (610, 32328), (720, 27389), (732, 26940), (898, 21960), (915, 21552), (976, 20205), (1098, 17960), (1220, 16164), (1347, 14640), (1464, 13470), (1796, 10980), (1830, 10776), (2196, 8980), (2245, 8784), (2440, 8082), (2694, 7320), (2745, 7184), (2928, 6735), (3592, 5490), (3660, 5388), (4041, 4880), (4392, 4490)]