18128187

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1$

素因数の和:169

約数の個数: 72

約数和(自身を含む): 34465392

約数和(自身を除く): 16337205

約数列:

[1, 3, 7, 9, 11, 21, 33, 37, 49, 63, 77, 99, 101, 111, 147, 231, 259, 303, 333, 407, 441, 539, 693, 707, 777, 909, 1111, 1221, 1617, 1813, 2121, 2331, 2849, 3333, 3663, 3737, 4851, 4949, 5439, 6363, 7777, 8547, 9999, 11211, 14847, 16317, 19943, 23331, 25641, 26159, 33633, 41107, 44541, 54439, 59829, 69993, 78477, 123321, 163317, 179487, 183113, 235431, 287749, 369963, 489951, 549339, 863247, 1648017, 2014243, 2589741, 6042729, 18128187]

約数ペア:

[(1, 18128187), (3, 6042729), (7, 2589741), (9, 2014243), (11, 1648017), (21, 863247), (33, 549339), (37, 489951), (49, 369963), (63, 287749), (77, 235431), (99, 183113), (101, 179487), (111, 163317), (147, 123321), (231, 78477), (259, 69993), (303, 59829), (333, 54439), (407, 44541), (441, 41107), (539, 33633), (693, 26159), (707, 25641), (777, 23331), (909, 19943), (1111, 16317), (1221, 14847), (1617, 11211), (1813, 9999), (2121, 8547), (2331, 7777), (2849, 6363), (3333, 5439), (3663, 4949), (3737, 4851)]