81378808

素因数分解:

$2^3\times 7^3\times {\mathrm{47}}^1\times {\mathrm{631}}^1$

素因数の和:705

約数の個数: 64

約数和(自身を含む): 182016000

約数和(自身を除く): 100637192

約数列:

[1, 2, 4, 7, 8, 14, 28, 47, 49, 56, 94, 98, 188, 196, 329, 343, 376, 392, 631, 658, 686, 1262, 1316, 1372, 2303, 2524, 2632, 2744, 4417, 4606, 5048, 8834, 9212, 16121, 17668, 18424, 29657, 30919, 32242, 35336, 59314, 61838, 64484, 118628, 123676, 128968, 207599, 216433, 237256, 247352, 415198, 432866, 830396, 865732, 1453193, 1660792, 1731464, 2906386, 5812772, 10172351, 11625544, 20344702, 40689404, 81378808]

約数ペア:

[(1, 81378808), (2, 40689404), (4, 20344702), (7, 11625544), (8, 10172351), (14, 5812772), (28, 2906386), (47, 1731464), (49, 1660792), (56, 1453193), (94, 865732), (98, 830396), (188, 432866), (196, 415198), (329, 247352), (343, 237256), (376, 216433), (392, 207599), (631, 128968), (658, 123676), (686, 118628), (1262, 64484), (1316, 61838), (1372, 59314), (2303, 35336), (2524, 32242), (2632, 30919), (2744, 29657), (4417, 18424), (4606, 17668), (5048, 16121), (8834, 9212)]