21900905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{347}}^1\times {\mathrm{971}}^1$

素因数の和:1336

約数の個数: 16

約数和(自身を含む): 28413504

約数和(自身を除く): 6512599

約数列:

[1, 5, 13, 65, 347, 971, 1735, 4511, 4855, 12623, 22555, 63115, 336937, 1684685, 4380181, 21900905]

約数ペア:

[(1, 21900905), (5, 4380181), (13, 1684685), (65, 336937), (347, 63115), (971, 22555), (1735, 12623), (4511, 4855)]