18142985

素因数分解:

$5^1\times 7^3\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:246

約数の個数: 32

約数和(自身を含む): 25920000

約数和(自身を除く): 7777015

約数列:

[1, 5, 7, 35, 49, 71, 149, 245, 343, 355, 497, 745, 1043, 1715, 2485, 3479, 5215, 7301, 10579, 17395, 24353, 36505, 51107, 52895, 74053, 121765, 255535, 370265, 518371, 2591855, 3628597, 18142985]

約数ペア:

[(1, 18142985), (5, 3628597), (7, 2591855), (35, 518371), (49, 370265), (71, 255535), (149, 121765), (245, 74053), (343, 52895), (355, 51107), (497, 36505), (745, 24353), (1043, 17395), (1715, 10579), (2485, 7301), (3479, 5215)]