20994980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{17209}}^1$

素因数の和:17279

約数の個数: 24

約数和(自身を含む): 44814840

約数和(自身を除く): 23819860

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 17209, 34418, 68836, 86045, 172090, 344180, 1049749, 2099498, 4198996, 5248745, 10497490, 20994980]

約数ペア:

[(1, 20994980), (2, 10497490), (4, 5248745), (5, 4198996), (10, 2099498), (20, 1049749), (61, 344180), (122, 172090), (244, 86045), (305, 68836), (610, 34418), (1220, 17209)]