1649920

素因数分解:

$2^8\times 5^1\times {\mathrm{1289}}^1$

素因数の和:1310

約数の個数: 36

約数和(自身を含む): 3955140

約数和(自身を除く): 2305220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 1289, 2578, 5156, 6445, 10312, 12890, 20624, 25780, 41248, 51560, 82496, 103120, 164992, 206240, 329984, 412480, 824960, 1649920]

約数ペア:

[(1, 1649920), (2, 824960), (4, 412480), (5, 329984), (8, 206240), (10, 164992), (16, 103120), (20, 82496), (32, 51560), (40, 41248), (64, 25780), (80, 20624), (128, 12890), (160, 10312), (256, 6445), (320, 5156), (640, 2578), (1280, 1289)]