20626640

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2897}}^1$

素因数の和:2999

約数の個数: 40

約数和(自身を含む): 48512520

約数和(自身を除く): 27885880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2897, 3560, 5794, 7120, 11588, 14485, 23176, 28970, 46352, 57940, 115880, 231760, 257833, 515666, 1031332, 1289165, 2062664, 2578330, 4125328, 5156660, 10313320, 20626640]

約数ペア:

[(1, 20626640), (2, 10313320), (4, 5156660), (5, 4125328), (8, 2578330), (10, 2062664), (16, 1289165), (20, 1031332), (40, 515666), (80, 257833), (89, 231760), (178, 115880), (356, 57940), (445, 46352), (712, 28970), (890, 23176), (1424, 14485), (1780, 11588), (2897, 7120), (3560, 5794)]