21535040

素因数分解:

$2^6\times 5^1\times {\mathrm{173}}^1\times {\mathrm{389}}^1$

素因数の和:579

約数の個数: 56

約数和(自身を含む): 51709320

約数和(自身を除く): 30174280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 173, 320, 346, 389, 692, 778, 865, 1384, 1556, 1730, 1945, 2768, 3112, 3460, 3890, 5536, 6224, 6920, 7780, 11072, 12448, 13840, 15560, 24896, 27680, 31120, 55360, 62240, 67297, 124480, 134594, 269188, 336485, 538376, 672970, 1076752, 1345940, 2153504, 2691880, 4307008, 5383760, 10767520, 21535040]

約数ペア:

[(1, 21535040), (2, 10767520), (4, 5383760), (5, 4307008), (8, 2691880), (10, 2153504), (16, 1345940), (20, 1076752), (32, 672970), (40, 538376), (64, 336485), (80, 269188), (160, 134594), (173, 124480), (320, 67297), (346, 62240), (389, 55360), (692, 31120), (778, 27680), (865, 24896), (1384, 15560), (1556, 13840), (1730, 12448), (1945, 11072), (2768, 7780), (3112, 6920), (3460, 6224), (3890, 5536)]