18689363

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 24855552

約数和(自身を除く): 6166189

約数列:

[1, 7, 11, 23, 61, 77, 161, 173, 253, 427, 671, 1211, 1403, 1771, 1903, 3979, 4697, 9821, 10553, 13321, 15433, 27853, 43769, 73871, 108031, 116083, 242719, 306383, 812581, 1699033, 2669909, 18689363]

約数ペア:

[(1, 18689363), (7, 2669909), (11, 1699033), (23, 812581), (61, 306383), (77, 242719), (161, 116083), (173, 108031), (253, 73871), (427, 43769), (671, 27853), (1211, 15433), (1403, 13321), (1771, 10553), (1903, 9821), (3979, 4697)]