81521300

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{127}}^1\times {\mathrm{131}}^1$

素因数の和:286

約数の個数: 108

約数和(自身を含む): 208986624

約数和(自身を除く): 127465324

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 98, 100, 127, 131, 140, 175, 196, 245, 254, 262, 350, 490, 508, 524, 635, 655, 700, 889, 917, 980, 1225, 1270, 1310, 1778, 1834, 2450, 2540, 2620, 3175, 3275, 3556, 3668, 4445, 4585, 4900, 6223, 6350, 6419, 6550, 8890, 9170, 12446, 12700, 12838, 13100, 16637, 17780, 18340, 22225, 22925, 24892, 25676, 31115, 32095, 33274, 44450, 45850, 62230, 64190, 66548, 83185, 88900, 91700, 116459, 124460, 128380, 155575, 160475, 166370, 232918, 311150, 320950, 332740, 415925, 465836, 582295, 622300, 641900, 815213, 831850, 1164590, 1630426, 1663700, 2329180, 2911475, 3260852, 4076065, 5822950, 8152130, 11645900, 16304260, 20380325, 40760650, 81521300]

約数ペア:

[(1, 81521300), (2, 40760650), (4, 20380325), (5, 16304260), (7, 11645900), (10, 8152130), (14, 5822950), (20, 4076065), (25, 3260852), (28, 2911475), (35, 2329180), (49, 1663700), (50, 1630426), (70, 1164590), (98, 831850), (100, 815213), (127, 641900), (131, 622300), (140, 582295), (175, 465836), (196, 415925), (245, 332740), (254, 320950), (262, 311150), (350, 232918), (490, 166370), (508, 160475), (524, 155575), (635, 128380), (655, 124460), (700, 116459), (889, 91700), (917, 88900), (980, 83185), (1225, 66548), (1270, 64190), (1310, 62230), (1778, 45850), (1834, 44450), (2450, 33274), (2540, 32095), (2620, 31115), (3175, 25676), (3275, 24892), (3556, 22925), (3668, 22225), (4445, 18340), (4585, 17780), (4900, 16637), (6223, 13100), (6350, 12838), (6419, 12700), (6550, 12446), (8890, 9170)]