81304520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{257}}^1\times {\mathrm{719}}^1$

素因数の和:998

約数の個数: 64

約数和(自身を含む): 200620800

約数和(自身を除く): 119316280

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 257, 440, 514, 719, 1028, 1285, 1438, 2056, 2570, 2827, 2876, 3595, 5140, 5654, 5752, 7190, 7909, 10280, 11308, 14135, 14380, 15818, 22616, 28270, 28760, 31636, 39545, 56540, 63272, 79090, 113080, 158180, 184783, 316360, 369566, 739132, 923915, 1478264, 1847830, 2032613, 3695660, 4065226, 7391320, 8130452, 10163065, 16260904, 20326130, 40652260, 81304520]

約数ペア:

[(1, 81304520), (2, 40652260), (4, 20326130), (5, 16260904), (8, 10163065), (10, 8130452), (11, 7391320), (20, 4065226), (22, 3695660), (40, 2032613), (44, 1847830), (55, 1478264), (88, 923915), (110, 739132), (220, 369566), (257, 316360), (440, 184783), (514, 158180), (719, 113080), (1028, 79090), (1285, 63272), (1438, 56540), (2056, 39545), (2570, 31636), (2827, 28760), (2876, 28270), (3595, 22616), (5140, 15818), (5654, 14380), (5752, 14135), (7190, 11308), (7909, 10280)]