21138546

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{347}}^1$

素因数の和:447

約数の個数: 64

約数和(自身を含む): 50512896

約数和(自身を除く): 29374350

約数列:

[1, 2, 3, 6, 11, 13, 22, 26, 33, 39, 66, 71, 78, 142, 143, 213, 286, 347, 426, 429, 694, 781, 858, 923, 1041, 1562, 1846, 2082, 2343, 2769, 3817, 4511, 4686, 5538, 7634, 9022, 10153, 11451, 13533, 20306, 22902, 24637, 27066, 30459, 49274, 49621, 60918, 73911, 99242, 147822, 148863, 271007, 297726, 320281, 542014, 640562, 813021, 960843, 1626042, 1921686, 3523091, 7046182, 10569273, 21138546]

約数ペア:

[(1, 21138546), (2, 10569273), (3, 7046182), (6, 3523091), (11, 1921686), (13, 1626042), (22, 960843), (26, 813021), (33, 640562), (39, 542014), (66, 320281), (71, 297726), (78, 271007), (142, 148863), (143, 147822), (213, 99242), (286, 73911), (347, 60918), (426, 49621), (429, 49274), (694, 30459), (781, 27066), (858, 24637), (923, 22902), (1041, 20306), (1562, 13533), (1846, 11451), (2082, 10153), (2343, 9022), (2769, 7634), (3817, 5538), (4511, 4686)]