21001954

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1\times {\mathrm{113}}^1$

素因数の和:274

約数の個数: 32

約数和(自身を含む): 34418880

約数和(自身を除く): 13416926

約数列:

[1, 2, 19, 38, 67, 73, 113, 134, 146, 226, 1273, 1387, 2147, 2546, 2774, 4294, 4891, 7571, 8249, 9782, 15142, 16498, 92929, 143849, 156731, 185858, 287698, 313462, 552683, 1105366, 10500977, 21001954]

約数ペア:

[(1, 21001954), (2, 10500977), (19, 1105366), (38, 552683), (67, 313462), (73, 287698), (113, 185858), (134, 156731), (146, 143849), (226, 92929), (1273, 16498), (1387, 15142), (2147, 9782), (2546, 8249), (2774, 7571), (4294, 4891)]