209278979

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{677}}^1$

素因数の和:819

約数の個数: 32

約数和(自身を含む): 267294720

約数和(自身を除く): 58015741

約数列:

[1, 7, 13, 43, 79, 91, 301, 553, 559, 677, 1027, 3397, 3913, 4739, 7189, 8801, 23779, 29111, 44161, 53483, 61607, 203777, 309127, 374381, 378443, 695279, 2299769, 2649101, 4866953, 16098383, 29896997, 209278979]

約数ペア:

[(1, 209278979), (7, 29896997), (13, 16098383), (43, 4866953), (79, 2649101), (91, 2299769), (301, 695279), (553, 378443), (559, 374381), (677, 309127), (1027, 203777), (3397, 61607), (3913, 53483), (4739, 44161), (7189, 29111), (8801, 23779)]