81215440

素因数分解:

$2^4\times 5^1\times {\mathrm{167}}^1\times {\mathrm{6079}}^1$

素因数の和:6259

約数の個数: 40

約数和(自身を含む): 189987840

約数和(自身を除く): 108772400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 167, 334, 668, 835, 1336, 1670, 2672, 3340, 6079, 6680, 12158, 13360, 24316, 30395, 48632, 60790, 97264, 121580, 243160, 486320, 1015193, 2030386, 4060772, 5075965, 8121544, 10151930, 16243088, 20303860, 40607720, 81215440]

約数ペア:

[(1, 81215440), (2, 40607720), (4, 20303860), (5, 16243088), (8, 10151930), (10, 8121544), (16, 5075965), (20, 4060772), (40, 2030386), (80, 1015193), (167, 486320), (334, 243160), (668, 121580), (835, 97264), (1336, 60790), (1670, 48632), (2672, 30395), (3340, 24316), (6079, 13360), (6680, 12158)]