18101991

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 26889408

約数和(自身を除く): 8787417

約数列:

[1, 3, 17, 37, 51, 53, 111, 159, 181, 543, 629, 901, 1887, 1961, 2703, 3077, 5883, 6697, 9231, 9593, 20091, 28779, 33337, 100011, 113849, 163081, 341547, 354941, 489243, 1064823, 6033997, 18101991]

約数ペア:

[(1, 18101991), (3, 6033997), (17, 1064823), (37, 489243), (51, 354941), (53, 341547), (111, 163081), (159, 113849), (181, 100011), (543, 33337), (629, 28779), (901, 20091), (1887, 9593), (1961, 9231), (2703, 6697), (3077, 5883)]