15840220

素因数分解:

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

素因数の和:918

約数の個数: 48

約数和(自身を含む): 36741600

約数和(自身を除く): 20901380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 809, 890, 979, 1618, 1780, 1958, 3236, 3916, 4045, 4895, 8090, 8899, 9790, 16180, 17798, 19580, 35596, 44495, 72001, 88990, 144002, 177980, 288004, 360005, 720010, 792011, 1440020, 1584022, 3168044, 3960055, 7920110, 15840220]

約数ペア:

[(1, 15840220), (2, 7920110), (4, 3960055), (5, 3168044), (10, 1584022), (11, 1440020), (20, 792011), (22, 720010), (44, 360005), (55, 288004), (89, 177980), (110, 144002), (178, 88990), (220, 72001), (356, 44495), (445, 35596), (809, 19580), (890, 17798), (979, 16180), (1618, 9790), (1780, 8899), (1958, 8090), (3236, 4895), (3916, 4045)]