21019383

素因数分解:

$3^2\times 7^3\times {\mathrm{11}}^1\times {\mathrm{619}}^1$

素因数の和:657

約数の個数: 48

約数和(自身を含む): 38688000

約数和(自身を除く): 17668617

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 63, 77, 99, 147, 231, 343, 441, 539, 619, 693, 1029, 1617, 1857, 3087, 3773, 4333, 4851, 5571, 6809, 11319, 12999, 20427, 30331, 33957, 38997, 47663, 61281, 90993, 142989, 212317, 272979, 333641, 428967, 636951, 1000923, 1910853, 2335487, 3002769, 7006461, 21019383]

約数ペア:

[(1, 21019383), (3, 7006461), (7, 3002769), (9, 2335487), (11, 1910853), (21, 1000923), (33, 636951), (49, 428967), (63, 333641), (77, 272979), (99, 212317), (147, 142989), (231, 90993), (343, 61281), (441, 47663), (539, 38997), (619, 33957), (693, 30331), (1029, 20427), (1617, 12999), (1857, 11319), (3087, 6809), (3773, 5571), (4333, 4851)]