81859778

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1319}}^1$

素因数の和:1383

約数の個数: 64

約数和(自身を含む): 170311680

約数和(自身を除く): 88451902

約数列:

[1, 2, 7, 11, 13, 14, 22, 26, 31, 62, 77, 91, 143, 154, 182, 217, 286, 341, 403, 434, 682, 806, 1001, 1319, 2002, 2387, 2638, 2821, 4433, 4774, 5642, 8866, 9233, 14509, 17147, 18466, 29018, 31031, 34294, 40889, 62062, 81778, 101563, 120029, 188617, 203126, 240058, 286223, 377234, 449779, 531557, 572446, 899558, 1063114, 1320319, 2640638, 3148453, 3720899, 5847127, 6296906, 7441798, 11694254, 40929889, 81859778]

約数ペア:

[(1, 81859778), (2, 40929889), (7, 11694254), (11, 7441798), (13, 6296906), (14, 5847127), (22, 3720899), (26, 3148453), (31, 2640638), (62, 1320319), (77, 1063114), (91, 899558), (143, 572446), (154, 531557), (182, 449779), (217, 377234), (286, 286223), (341, 240058), (403, 203126), (434, 188617), (682, 120029), (806, 101563), (1001, 81778), (1319, 62062), (2002, 40889), (2387, 34294), (2638, 31031), (2821, 29018), (4433, 18466), (4774, 17147), (5642, 14509), (8866, 9233)]