18391219

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{229}}^1$

素因数の和:403

約数の個数: 24

約数和(自身を含む): 23598000

約数和(自身を除く): 5206781

約数列:

[1, 7, 11, 49, 77, 149, 229, 539, 1043, 1603, 1639, 2519, 7301, 11221, 11473, 17633, 34121, 80311, 123431, 238847, 375331, 1671929, 2627317, 18391219]

約数ペア:

[(1, 18391219), (7, 2627317), (11, 1671929), (49, 375331), (77, 238847), (149, 123431), (229, 80311), (539, 34121), (1043, 17633), (1603, 11473), (1639, 11221), (2519, 7301)]