21054340

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{14827}}^1$

素因数の和:14907

約数の個数: 24

約数和(自身を含む): 44839872

約数和(自身を除く): 23785532

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 14827, 29654, 59308, 74135, 148270, 296540, 1052717, 2105434, 4210868, 5263585, 10527170, 21054340]

約数ペア:

[(1, 21054340), (2, 10527170), (4, 5263585), (5, 4210868), (10, 2105434), (20, 1052717), (71, 296540), (142, 148270), (284, 74135), (355, 59308), (710, 29654), (1420, 14827)]