81906820

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{167}}^1\times {\mathrm{179}}^1$

素因数の和:492

約数の個数: 48

約数和(自身を含む): 175271040

約数和(自身を除く): 93364220

約数列:

[1, 2, 4, 5, 10, 20, 137, 167, 179, 274, 334, 358, 548, 668, 685, 716, 835, 895, 1370, 1670, 1790, 2740, 3340, 3580, 22879, 24523, 29893, 45758, 49046, 59786, 91516, 98092, 114395, 119572, 122615, 149465, 228790, 245230, 298930, 457580, 490460, 597860, 4095341, 8190682, 16381364, 20476705, 40953410, 81906820]

約数ペア:

[(1, 81906820), (2, 40953410), (4, 20476705), (5, 16381364), (10, 8190682), (20, 4095341), (137, 597860), (167, 490460), (179, 457580), (274, 298930), (334, 245230), (358, 228790), (548, 149465), (668, 122615), (685, 119572), (716, 114395), (835, 98092), (895, 91516), (1370, 59786), (1670, 49046), (1790, 45758), (2740, 29893), (3340, 24523), (3580, 22879)]