81215840

素因数分解:

$2^5\times 5^1\times {\mathrm{507599}}^1$

素因数の和:507614

約数の個数: 24

約数和(自身を含む): 191872800

約数和(自身を除く): 110656960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 507599, 1015198, 2030396, 2537995, 4060792, 5075990, 8121584, 10151980, 16243168, 20303960, 40607920, 81215840]

約数ペア:

[(1, 81215840), (2, 40607920), (4, 20303960), (5, 16243168), (8, 10151980), (10, 8121584), (16, 5075990), (20, 4060792), (32, 2537995), (40, 2030396), (80, 1015198), (160, 507599)]