19999740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1297}}^1$

素因数の和:1566

約数の個数: 48

約数和(自身を含む): 56260512

約数和(自身を除く): 36260772

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 257, 514, 771, 1028, 1285, 1297, 1542, 2570, 2594, 3084, 3855, 3891, 5140, 5188, 6485, 7710, 7782, 12970, 15420, 15564, 19455, 25940, 38910, 77820, 333329, 666658, 999987, 1333316, 1666645, 1999974, 3333290, 3999948, 4999935, 6666580, 9999870, 19999740]

約数ペア:

[(1, 19999740), (2, 9999870), (3, 6666580), (4, 4999935), (5, 3999948), (6, 3333290), (10, 1999974), (12, 1666645), (15, 1333316), (20, 999987), (30, 666658), (60, 333329), (257, 77820), (514, 38910), (771, 25940), (1028, 19455), (1285, 15564), (1297, 15420), (1542, 12970), (2570, 7782), (2594, 7710), (3084, 6485), (3855, 5188), (3891, 5140)]