81372700

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{223}}^1$

素因数の和:367

約数の個数: 72

約数和(自身を含む): 183738240

約数和(自身を除く): 102365540

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 89, 100, 164, 178, 205, 223, 356, 410, 445, 446, 820, 890, 892, 1025, 1115, 1780, 2050, 2225, 2230, 3649, 4100, 4450, 4460, 5575, 7298, 8900, 9143, 11150, 14596, 18245, 18286, 19847, 22300, 36490, 36572, 39694, 45715, 72980, 79388, 91225, 91430, 99235, 182450, 182860, 198470, 228575, 364900, 396940, 457150, 496175, 813727, 914300, 992350, 1627454, 1984700, 3254908, 4068635, 8137270, 16274540, 20343175, 40686350, 81372700]

約数ペア:

[(1, 81372700), (2, 40686350), (4, 20343175), (5, 16274540), (10, 8137270), (20, 4068635), (25, 3254908), (41, 1984700), (50, 1627454), (82, 992350), (89, 914300), (100, 813727), (164, 496175), (178, 457150), (205, 396940), (223, 364900), (356, 228575), (410, 198470), (445, 182860), (446, 182450), (820, 99235), (890, 91430), (892, 91225), (1025, 79388), (1115, 72980), (1780, 45715), (2050, 39694), (2225, 36572), (2230, 36490), (3649, 22300), (4100, 19847), (4450, 18286), (4460, 18245), (5575, 14596), (7298, 11150), (8900, 9143)]