21396020

素因数分解:

$2^2\times 5^1\times {\mathrm{347}}^1\times {\mathrm{3083}}^1$

素因数の和:3439

約数の個数: 24

約数和(自身を含む): 45075744

約数和(自身を除く): 23679724

約数列:

[1, 2, 4, 5, 10, 20, 347, 694, 1388, 1735, 3083, 3470, 6166, 6940, 12332, 15415, 30830, 61660, 1069801, 2139602, 4279204, 5349005, 10698010, 21396020]

約数ペア:

[(1, 21396020), (2, 10698010), (4, 5349005), (5, 4279204), (10, 2139602), (20, 1069801), (347, 61660), (694, 30830), (1388, 15415), (1735, 12332), (3083, 6940), (3470, 6166)]