21713913

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1213}}^1$

素因数の和:1255

約数の個数: 40

約数和(自身を含む): 37017288

約数和(自身を除く): 15303375

約数列:

[1, 3, 9, 13, 17, 27, 39, 51, 81, 117, 153, 221, 351, 459, 663, 1053, 1213, 1377, 1989, 3639, 5967, 10917, 15769, 17901, 20621, 32751, 47307, 61863, 98253, 141921, 185589, 268073, 425763, 556767, 804219, 1277289, 1670301, 2412657, 7237971, 21713913]

約数ペア:

[(1, 21713913), (3, 7237971), (9, 2412657), (13, 1670301), (17, 1277289), (27, 804219), (39, 556767), (51, 425763), (81, 268073), (117, 185589), (153, 141921), (221, 98253), (351, 61863), (459, 47307), (663, 32751), (1053, 20621), (1213, 17901), (1377, 15769), (1989, 10917), (3639, 5967)]