21187520

素因数分解:

$2^6\times 5^1\times {\mathrm{73}}^1\times {\mathrm{907}}^1$

素因数の和:997

約数の個数: 56

約数和(自身を含む): 51200304

約数和(自身を除く): 30012784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 73, 80, 146, 160, 292, 320, 365, 584, 730, 907, 1168, 1460, 1814, 2336, 2920, 3628, 4535, 4672, 5840, 7256, 9070, 11680, 14512, 18140, 23360, 29024, 36280, 58048, 66211, 72560, 132422, 145120, 264844, 290240, 331055, 529688, 662110, 1059376, 1324220, 2118752, 2648440, 4237504, 5296880, 10593760, 21187520]

約数ペア:

[(1, 21187520), (2, 10593760), (4, 5296880), (5, 4237504), (8, 2648440), (10, 2118752), (16, 1324220), (20, 1059376), (32, 662110), (40, 529688), (64, 331055), (73, 290240), (80, 264844), (146, 145120), (160, 132422), (292, 72560), (320, 66211), (365, 58048), (584, 36280), (730, 29024), (907, 23360), (1168, 18140), (1460, 14512), (1814, 11680), (2336, 9070), (2920, 7256), (3628, 5840), (4535, 4672)]