21709437

素因数分解:

$3^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1\times {\mathrm{659}}^1$

素因数の和:880

約数の個数: 16

約数和(自身を含む): 29568000

約数和(自身を除く): 7858563

約数列:

[1, 3, 79, 139, 237, 417, 659, 1977, 10981, 32943, 52061, 91601, 156183, 274803, 7236479, 21709437]

約数ペア:

[(1, 21709437), (3, 7236479), (79, 274803), (139, 156183), (237, 91601), (417, 52061), (659, 32943), (1977, 10981)]