21397688

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{6637}}^1$

素因数の和:6687

約数の個数: 32

約数和(自身を含む): 44607360

約数和(自身を除く): 23209672

約数列:

[1, 2, 4, 8, 13, 26, 31, 52, 62, 104, 124, 248, 403, 806, 1612, 3224, 6637, 13274, 26548, 53096, 86281, 172562, 205747, 345124, 411494, 690248, 822988, 1645976, 2674711, 5349422, 10698844, 21397688]

約数ペア:

[(1, 21397688), (2, 10698844), (4, 5349422), (8, 2674711), (13, 1645976), (26, 822988), (31, 690248), (52, 411494), (62, 345124), (104, 205747), (124, 172562), (248, 86281), (403, 53096), (806, 26548), (1612, 13274), (3224, 6637)]