81638460

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{647}}^1\times {\mathrm{701}}^1$

素因数の和:1363

約数の個数: 72

約数和(自身を含む): 248373216

約数和(自身を除く): 166734756

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 647, 701, 1294, 1402, 1941, 2103, 2588, 2804, 3235, 3505, 3882, 4206, 5823, 6309, 6470, 7010, 7764, 8412, 9705, 10515, 11646, 12618, 12940, 14020, 19410, 21030, 23292, 25236, 29115, 31545, 38820, 42060, 58230, 63090, 116460, 126180, 453547, 907094, 1360641, 1814188, 2267735, 2721282, 4081923, 4535470, 5442564, 6803205, 8163846, 9070940, 13606410, 16327692, 20409615, 27212820, 40819230, 81638460]

約数ペア:

[(1, 81638460), (2, 40819230), (3, 27212820), (4, 20409615), (5, 16327692), (6, 13606410), (9, 9070940), (10, 8163846), (12, 6803205), (15, 5442564), (18, 4535470), (20, 4081923), (30, 2721282), (36, 2267735), (45, 1814188), (60, 1360641), (90, 907094), (180, 453547), (647, 126180), (701, 116460), (1294, 63090), (1402, 58230), (1941, 42060), (2103, 38820), (2588, 31545), (2804, 29115), (3235, 25236), (3505, 23292), (3882, 21030), (4206, 19410), (5823, 14020), (6309, 12940), (6470, 12618), (7010, 11646), (7764, 10515), (8412, 9705)]