21391492

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{4201}}^1$

素因数の和:4291

約数の個数: 24

約数和(自身を含む): 40003040

約数和(自身を除く): 18611548

約数列:

[1, 2, 4, 19, 38, 67, 76, 134, 268, 1273, 2546, 4201, 5092, 8402, 16804, 79819, 159638, 281467, 319276, 562934, 1125868, 5347873, 10695746, 21391492]

約数ペア:

[(1, 21391492), (2, 10695746), (4, 5347873), (19, 1125868), (38, 562934), (67, 319276), (76, 281467), (134, 159638), (268, 79819), (1273, 16804), (2546, 8402), (4201, 5092)]