18435519

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1$

素因数の和:201

約数の個数: 40

約数和(自身を含む): 28962560

約数和(自身を除く): 10527041

約数列:

[1, 3, 9, 27, 43, 67, 79, 81, 129, 201, 237, 387, 603, 711, 1161, 1809, 2133, 2881, 3397, 3483, 5293, 5427, 6399, 8643, 10191, 15879, 25929, 30573, 47637, 77787, 91719, 142911, 227599, 233361, 275157, 428733, 682797, 2048391, 6145173, 18435519]

約数ペア:

[(1, 18435519), (3, 6145173), (9, 2048391), (27, 682797), (43, 428733), (67, 275157), (79, 233361), (81, 227599), (129, 142911), (201, 91719), (237, 77787), (387, 47637), (603, 30573), (711, 25929), (1161, 15879), (1809, 10191), (2133, 8643), (2881, 6399), (3397, 5427), (3483, 5293)]