18390015

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{739}}^1$

素因数の和:836

約数の個数: 48

約数和(自身を含む): 36940800

約数和(自身を除く): 18550785

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 79, 105, 237, 315, 395, 553, 711, 739, 1185, 1659, 2217, 2765, 3555, 3695, 4977, 5173, 6651, 8295, 11085, 15519, 24885, 25865, 33255, 46557, 58381, 77595, 175143, 232785, 291905, 408667, 525429, 875715, 1226001, 2043335, 2627145, 3678003, 6130005, 18390015]

約数ペア:

[(1, 18390015), (3, 6130005), (5, 3678003), (7, 2627145), (9, 2043335), (15, 1226001), (21, 875715), (35, 525429), (45, 408667), (63, 291905), (79, 232785), (105, 175143), (237, 77595), (315, 58381), (395, 46557), (553, 33255), (711, 25865), (739, 24885), (1185, 15519), (1659, 11085), (2217, 8295), (2765, 6651), (3555, 5173), (3695, 4977)]