19928517

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{331}}^1$

素因数の和:449

約数の個数: 32

約数和(自身を含む): 31617024

約数和(自身を除く): 11688507

約数列:

[1, 3, 7, 21, 47, 61, 141, 183, 329, 331, 427, 987, 993, 1281, 2317, 2867, 6951, 8601, 15557, 20069, 20191, 46671, 60207, 60573, 108899, 141337, 326697, 424011, 948977, 2846931, 6642839, 19928517]

約数ペア:

[(1, 19928517), (3, 6642839), (7, 2846931), (21, 948977), (47, 424011), (61, 326697), (141, 141337), (183, 108899), (329, 60573), (331, 60207), (427, 46671), (987, 20191), (993, 20069), (1281, 15557), (2317, 8601), (2867, 6951)]