128275040

素因数分解:

$2^5\times 5^1\times {\mathrm{809}}^1\times {\mathrm{991}}^1$

素因数の和:1815

約数の個数: 48

約数和(自身を含む): 303730560

約数和(自身を除く): 175455520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 809, 991, 1618, 1982, 3236, 3964, 4045, 4955, 6472, 7928, 8090, 9910, 12944, 15856, 16180, 19820, 25888, 31712, 32360, 39640, 64720, 79280, 129440, 158560, 801719, 1603438, 3206876, 4008595, 6413752, 8017190, 12827504, 16034380, 25655008, 32068760, 64137520, 128275040]

約数ペア:

[(1, 128275040), (2, 64137520), (4, 32068760), (5, 25655008), (8, 16034380), (10, 12827504), (16, 8017190), (20, 6413752), (32, 4008595), (40, 3206876), (80, 1603438), (160, 801719), (809, 158560), (991, 129440), (1618, 79280), (1982, 64720), (3236, 39640), (3964, 32360), (4045, 31712), (4955, 25888), (6472, 19820), (7928, 16180), (8090, 15856), (9910, 12944)]