21699209

素因数分解:

$7^3\times {\mathrm{41}}^1\times {\mathrm{1543}}^1$

素因数の和:1605

約数の個数: 16

約数和(自身を含む): 25939200

約数和(自身を除く): 4239991

約数列:

[1, 7, 41, 49, 287, 343, 1543, 2009, 10801, 14063, 63263, 75607, 442841, 529249, 3099887, 21699209]

約数ペア:

[(1, 21699209), (7, 3099887), (41, 529249), (49, 442841), (287, 75607), (343, 63263), (1543, 14063), (2009, 10801)]