12977980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{317}}^1$

素因数の和:438

約数の個数: 48

約数和(自身を含む): 28848960

約数和(自身を除く): 15870980

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 89, 92, 115, 178, 230, 317, 356, 445, 460, 634, 890, 1268, 1585, 1780, 2047, 3170, 4094, 6340, 7291, 8188, 10235, 14582, 20470, 28213, 29164, 36455, 40940, 56426, 72910, 112852, 141065, 145820, 282130, 564260, 648899, 1297798, 2595596, 3244495, 6488990, 12977980]

約数ペア:

[(1, 12977980), (2, 6488990), (4, 3244495), (5, 2595596), (10, 1297798), (20, 648899), (23, 564260), (46, 282130), (89, 145820), (92, 141065), (115, 112852), (178, 72910), (230, 56426), (317, 40940), (356, 36455), (445, 29164), (460, 28213), (634, 20470), (890, 14582), (1268, 10235), (1585, 8188), (1780, 7291), (2047, 6340), (3170, 4094)]