18915820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{173}}^1$

素因数の和:271

約数の個数: 96

約数和(自身を含む): 50512896

約数和(自身を除く): 31597076

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 71, 77, 110, 140, 142, 154, 173, 220, 284, 308, 346, 355, 385, 497, 692, 710, 770, 781, 865, 994, 1211, 1420, 1540, 1562, 1730, 1903, 1988, 2422, 2485, 3124, 3460, 3806, 3905, 4844, 4970, 5467, 6055, 7612, 7810, 9515, 9940, 10934, 12110, 12283, 13321, 15620, 19030, 21868, 24220, 24566, 26642, 27335, 38060, 49132, 53284, 54670, 61415, 66605, 85981, 109340, 122830, 133210, 135113, 171962, 245660, 266420, 270226, 343924, 429905, 540452, 675565, 859810, 945791, 1351130, 1719620, 1891582, 2702260, 3783164, 4728955, 9457910, 18915820]

約数ペア:

[(1, 18915820), (2, 9457910), (4, 4728955), (5, 3783164), (7, 2702260), (10, 1891582), (11, 1719620), (14, 1351130), (20, 945791), (22, 859810), (28, 675565), (35, 540452), (44, 429905), (55, 343924), (70, 270226), (71, 266420), (77, 245660), (110, 171962), (140, 135113), (142, 133210), (154, 122830), (173, 109340), (220, 85981), (284, 66605), (308, 61415), (346, 54670), (355, 53284), (385, 49132), (497, 38060), (692, 27335), (710, 26642), (770, 24566), (781, 24220), (865, 21868), (994, 19030), (1211, 15620), (1420, 13321), (1540, 12283), (1562, 12110), (1730, 10934), (1903, 9940), (1988, 9515), (2422, 7810), (2485, 7612), (3124, 6055), (3460, 5467), (3806, 4970), (3905, 4844)]