21054128

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{69257}}^1$

素因数の和:69284

約数の個数: 20

約数和(自身を含む): 42939960

約数和(自身を除く): 21885832

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 69257, 138514, 277028, 554056, 1108112, 1315883, 2631766, 5263532, 10527064, 21054128]

約数ペア:

[(1, 21054128), (2, 10527064), (4, 5263532), (8, 2631766), (16, 1315883), (19, 1108112), (38, 554056), (76, 277028), (152, 138514), (304, 69257)]