81810860

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{1039}}^1$

素因数の和:1206

約数の個数: 48

約数和(自身を含む): 178913280

約数和(自身を除く): 97102420

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 127, 155, 254, 310, 508, 620, 635, 1039, 1270, 2078, 2540, 3937, 4156, 5195, 7874, 10390, 15748, 19685, 20780, 32209, 39370, 64418, 78740, 128836, 131953, 161045, 263906, 322090, 527812, 644180, 659765, 1319530, 2639060, 4090543, 8181086, 16362172, 20452715, 40905430, 81810860]

約数ペア:

[(1, 81810860), (2, 40905430), (4, 20452715), (5, 16362172), (10, 8181086), (20, 4090543), (31, 2639060), (62, 1319530), (124, 659765), (127, 644180), (155, 527812), (254, 322090), (310, 263906), (508, 161045), (620, 131953), (635, 128836), (1039, 78740), (1270, 64418), (2078, 39370), (2540, 32209), (3937, 20780), (4156, 19685), (5195, 15748), (7874, 10390)]