21270280

素因数分解:

$2^3\times 5^1\times {\mathrm{283}}^1\times {\mathrm{1879}}^1$

素因数の和:2173

約数の個数: 32

約数和(自身を含む): 48052800

約数和(自身を除く): 26782520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 283, 566, 1132, 1415, 1879, 2264, 2830, 3758, 5660, 7516, 9395, 11320, 15032, 18790, 37580, 75160, 531757, 1063514, 2127028, 2658785, 4254056, 5317570, 10635140, 21270280]

約数ペア:

[(1, 21270280), (2, 10635140), (4, 5317570), (5, 4254056), (8, 2658785), (10, 2127028), (20, 1063514), (40, 531757), (283, 75160), (566, 37580), (1132, 18790), (1415, 15032), (1879, 11320), (2264, 9395), (2830, 7516), (3758, 5660)]