20128144

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{907}}^1$

素因数の和:1007

約数の個数: 40

約数和(自身を含む): 41659040

約数和(自身を除く): 21530896

約数列:

[1, 2, 4, 8, 16, 19, 38, 73, 76, 146, 152, 292, 304, 584, 907, 1168, 1387, 1814, 2774, 3628, 5548, 7256, 11096, 14512, 17233, 22192, 34466, 66211, 68932, 132422, 137864, 264844, 275728, 529688, 1059376, 1258009, 2516018, 5032036, 10064072, 20128144]

約数ペア:

[(1, 20128144), (2, 10064072), (4, 5032036), (8, 2516018), (16, 1258009), (19, 1059376), (38, 529688), (73, 275728), (76, 264844), (146, 137864), (152, 132422), (292, 68932), (304, 66211), (584, 34466), (907, 22192), (1168, 17233), (1387, 14512), (1814, 11096), (2774, 7256), (3628, 5548)]