80870900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1987}}^1$

素因数の和:2049

約数の個数: 72

約数和(自身を含む): 196716576

約数和(自身を除く): 115845676

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 37, 44, 50, 55, 74, 100, 110, 148, 185, 220, 275, 370, 407, 550, 740, 814, 925, 1100, 1628, 1850, 1987, 2035, 3700, 3974, 4070, 7948, 8140, 9935, 10175, 19870, 20350, 21857, 39740, 40700, 43714, 49675, 73519, 87428, 99350, 109285, 147038, 198700, 218570, 294076, 367595, 437140, 546425, 735190, 808709, 1092850, 1470380, 1617418, 1837975, 2185700, 3234836, 3675950, 4043545, 7351900, 8087090, 16174180, 20217725, 40435450, 80870900]

約数ペア:

[(1, 80870900), (2, 40435450), (4, 20217725), (5, 16174180), (10, 8087090), (11, 7351900), (20, 4043545), (22, 3675950), (25, 3234836), (37, 2185700), (44, 1837975), (50, 1617418), (55, 1470380), (74, 1092850), (100, 808709), (110, 735190), (148, 546425), (185, 437140), (220, 367595), (275, 294076), (370, 218570), (407, 198700), (550, 147038), (740, 109285), (814, 99350), (925, 87428), (1100, 73519), (1628, 49675), (1850, 43714), (1987, 40700), (2035, 39740), (3700, 21857), (3974, 20350), (4070, 19870), (7948, 10175), (8140, 9935)]