21640839

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{7901}}^1$

素因数の和:7998

約数の個数: 16

約数和(自身を含む): 31860864

約数和(自身を除く): 10220025

約数列:

[1, 3, 11, 33, 83, 249, 913, 2739, 7901, 23703, 86911, 260733, 655783, 1967349, 7213613, 21640839]

約数ペア:

[(1, 21640839), (3, 7213613), (11, 1967349), (33, 655783), (83, 260733), (249, 86911), (913, 23703), (2739, 7901)]