81495820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{607}}^1$

素因数の和:767

約数の個数: 72

約数和(自身を含む): 200866176

約数和(自身を除く): 119370356

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 137, 140, 196, 245, 274, 490, 548, 607, 685, 959, 980, 1214, 1370, 1918, 2428, 2740, 3035, 3836, 4249, 4795, 6070, 6713, 8498, 9590, 12140, 13426, 16996, 19180, 21245, 26852, 29743, 33565, 42490, 59486, 67130, 83159, 84980, 118972, 134260, 148715, 166318, 297430, 332636, 415795, 582113, 594860, 831590, 1164226, 1663180, 2328452, 2910565, 4074791, 5821130, 8149582, 11642260, 16299164, 20373955, 40747910, 81495820]

約数ペア:

[(1, 81495820), (2, 40747910), (4, 20373955), (5, 16299164), (7, 11642260), (10, 8149582), (14, 5821130), (20, 4074791), (28, 2910565), (35, 2328452), (49, 1663180), (70, 1164226), (98, 831590), (137, 594860), (140, 582113), (196, 415795), (245, 332636), (274, 297430), (490, 166318), (548, 148715), (607, 134260), (685, 118972), (959, 84980), (980, 83159), (1214, 67130), (1370, 59486), (1918, 42490), (2428, 33565), (2740, 29743), (3035, 26852), (3836, 21245), (4249, 19180), (4795, 16996), (6070, 13426), (6713, 12140), (8498, 9590)]