21286680

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{179}}^1\times {\mathrm{991}}^1$

素因数の和:1184

約数の個数: 64

約数和(自身を含む): 64281600

約数和(自身を除く): 42994920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 179, 358, 537, 716, 895, 991, 1074, 1432, 1790, 1982, 2148, 2685, 2973, 3580, 3964, 4296, 4955, 5370, 5946, 7160, 7928, 9910, 10740, 11892, 14865, 19820, 21480, 23784, 29730, 39640, 59460, 118920, 177389, 354778, 532167, 709556, 886945, 1064334, 1419112, 1773890, 2128668, 2660835, 3547780, 4257336, 5321670, 7095560, 10643340, 21286680]

約数ペア:

[(1, 21286680), (2, 10643340), (3, 7095560), (4, 5321670), (5, 4257336), (6, 3547780), (8, 2660835), (10, 2128668), (12, 1773890), (15, 1419112), (20, 1064334), (24, 886945), (30, 709556), (40, 532167), (60, 354778), (120, 177389), (179, 118920), (358, 59460), (537, 39640), (716, 29730), (895, 23784), (991, 21480), (1074, 19820), (1432, 14865), (1790, 11892), (1982, 10740), (2148, 9910), (2685, 7928), (2973, 7160), (3580, 5946), (3964, 5370), (4296, 4955)]