21721232

素因数分解:

$2^4\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{277}}^1$

素因数の和:340

約数の個数: 60

約数和(自身を含む): 47312820

約数和(自身を除く): 25591588

約数列:

[1, 2, 4, 8, 13, 16, 26, 29, 52, 58, 104, 116, 169, 208, 232, 277, 338, 377, 464, 554, 676, 754, 1108, 1352, 1508, 2216, 2704, 3016, 3601, 4432, 4901, 6032, 7202, 8033, 9802, 14404, 16066, 19604, 28808, 32132, 39208, 46813, 57616, 64264, 78416, 93626, 104429, 128528, 187252, 208858, 374504, 417716, 749008, 835432, 1357577, 1670864, 2715154, 5430308, 10860616, 21721232]

約数ペア:

[(1, 21721232), (2, 10860616), (4, 5430308), (8, 2715154), (13, 1670864), (16, 1357577), (26, 835432), (29, 749008), (52, 417716), (58, 374504), (104, 208858), (116, 187252), (169, 128528), (208, 104429), (232, 93626), (277, 78416), (338, 64264), (377, 57616), (464, 46813), (554, 39208), (676, 32132), (754, 28808), (1108, 19604), (1352, 16066), (1508, 14404), (2216, 9802), (2704, 8033), (3016, 7202), (3601, 6032), (4432, 4901)]