31680440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{809}}^1$

素因数の和:920

約数の個数: 64

約数和(自身を含む): 78732000

約数和(自身を除く): 47051560

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 89, 110, 178, 220, 356, 440, 445, 712, 809, 890, 979, 1618, 1780, 1958, 3236, 3560, 3916, 4045, 4895, 6472, 7832, 8090, 8899, 9790, 16180, 17798, 19580, 32360, 35596, 39160, 44495, 71192, 72001, 88990, 144002, 177980, 288004, 355960, 360005, 576008, 720010, 792011, 1440020, 1584022, 2880040, 3168044, 3960055, 6336088, 7920110, 15840220, 31680440]

約数ペア:

[(1, 31680440), (2, 15840220), (4, 7920110), (5, 6336088), (8, 3960055), (10, 3168044), (11, 2880040), (20, 1584022), (22, 1440020), (40, 792011), (44, 720010), (55, 576008), (88, 360005), (89, 355960), (110, 288004), (178, 177980), (220, 144002), (356, 88990), (440, 72001), (445, 71192), (712, 44495), (809, 39160), (890, 35596), (979, 32360), (1618, 19580), (1780, 17798), (1958, 16180), (3236, 9790), (3560, 8899), (3916, 8090), (4045, 7832), (4895, 6472)]