21993909

素因数分解:

$3^1\times 7^1\times {\mathrm{179}}^1\times {\mathrm{5851}}^1$

素因数の和:6040

約数の個数: 16

約数和(自身を含む): 33707520

約数和(自身を除く): 11713611

約数列:

[1, 3, 7, 21, 179, 537, 1253, 3759, 5851, 17553, 40957, 122871, 1047329, 3141987, 7331303, 21993909]

約数ペア:

[(1, 21993909), (3, 7331303), (7, 3141987), (21, 1047329), (179, 122871), (537, 40957), (1253, 17553), (3759, 5851)]