21361809

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{1129}}^1$

素因数の和:1209

約数の個数: 32

約数和(自身を含む): 35147520

約数和(自身を除く): 13785711

約数列:

[1, 3, 7, 17, 21, 51, 53, 119, 159, 357, 371, 901, 1113, 1129, 2703, 3387, 6307, 7903, 18921, 19193, 23709, 57579, 59837, 134351, 179511, 403053, 418859, 1017229, 1256577, 3051687, 7120603, 21361809]

約数ペア:

[(1, 21361809), (3, 7120603), (7, 3051687), (17, 1256577), (21, 1017229), (51, 418859), (53, 403053), (119, 179511), (159, 134351), (357, 59837), (371, 57579), (901, 23709), (1113, 19193), (1129, 18921), (2703, 7903), (3387, 6307)]