81701820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{541}}^1\times {\mathrm{839}}^1$

素因数の和:1395

約数の個数: 72

約数和(自身を含む): 248582880

約数和(自身を除く): 166881060

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 541, 839, 1082, 1623, 1678, 2164, 2517, 2705, 3246, 3356, 4195, 4869, 5034, 5410, 6492, 7551, 8115, 8390, 9738, 10068, 10820, 12585, 15102, 16230, 16780, 19476, 24345, 25170, 30204, 32460, 37755, 48690, 50340, 75510, 97380, 151020, 453899, 907798, 1361697, 1815596, 2269495, 2723394, 4085091, 4538990, 5446788, 6808485, 8170182, 9077980, 13616970, 16340364, 20425455, 27233940, 40850910, 81701820]

約数ペア:

[(1, 81701820), (2, 40850910), (3, 27233940), (4, 20425455), (5, 16340364), (6, 13616970), (9, 9077980), (10, 8170182), (12, 6808485), (15, 5446788), (18, 4538990), (20, 4085091), (30, 2723394), (36, 2269495), (45, 1815596), (60, 1361697), (90, 907798), (180, 453899), (541, 151020), (839, 97380), (1082, 75510), (1623, 50340), (1678, 48690), (2164, 37755), (2517, 32460), (2705, 30204), (3246, 25170), (3356, 24345), (4195, 19476), (4869, 16780), (5034, 16230), (5410, 15102), (6492, 12585), (7551, 10820), (8115, 10068), (8390, 9738)]