20454885

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^2\times {\mathrm{43}}^1$

素因数の和:127

約数の個数: 72

約数和(自身を含む): 40895712

約数和(自身を除く): 20440827

約数列:

[1, 3, 5, 9, 11, 15, 31, 33, 43, 45, 55, 93, 99, 129, 155, 165, 215, 279, 341, 387, 465, 473, 495, 645, 961, 1023, 1333, 1395, 1419, 1705, 1935, 2365, 2883, 3069, 3999, 4257, 4805, 5115, 6665, 7095, 8649, 10571, 11997, 14415, 14663, 15345, 19995, 21285, 31713, 41323, 43245, 43989, 52855, 59985, 73315, 95139, 123969, 131967, 158565, 206615, 219945, 371907, 454553, 475695, 619845, 659835, 1363659, 1859535, 2272765, 4090977, 6818295, 20454885]

約数ペア:

[(1, 20454885), (3, 6818295), (5, 4090977), (9, 2272765), (11, 1859535), (15, 1363659), (31, 659835), (33, 619845), (43, 475695), (45, 454553), (55, 371907), (93, 219945), (99, 206615), (129, 158565), (155, 131967), (165, 123969), (215, 95139), (279, 73315), (341, 59985), (387, 52855), (465, 43989), (473, 43245), (495, 41323), (645, 31713), (961, 21285), (1023, 19995), (1333, 15345), (1395, 14663), (1419, 14415), (1705, 11997), (1935, 10571), (2365, 8649), (2883, 7095), (3069, 6665), (3999, 5115), (4257, 4805)]