21040904

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{138427}}^1$

素因数の和:138452

約数の個数: 16

約数和(自身を含む): 41528400

約数和(自身を除く): 20487496

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 138427, 276854, 553708, 1107416, 2630113, 5260226, 10520452, 21040904]

約数ペア:

[(1, 21040904), (2, 10520452), (4, 5260226), (8, 2630113), (19, 1107416), (38, 553708), (76, 276854), (152, 138427)]