21521227

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{3877}}^1$

素因数の和:3958

約数の個数: 16

約数和(自身を含む): 26928832

約数和(自身を除く): 5407605

約数列:

[1, 7, 13, 61, 91, 427, 793, 3877, 5551, 27139, 50401, 236497, 352807, 1655479, 3074461, 21521227]

約数ペア:

[(1, 21521227), (7, 3074461), (13, 1655479), (61, 352807), (91, 236497), (427, 50401), (793, 27139), (3877, 5551)]