20553561

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{6397}}^1$

素因数の和:6430

約数の個数: 32

約数和(自身を含む): 36852480

約数和(自身を除く): 16298919

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 119, 153, 189, 357, 459, 1071, 3213, 6397, 19191, 44779, 57573, 108749, 134337, 172719, 326247, 403011, 761243, 978741, 1209033, 2283729, 2936223, 6851187, 20553561]

約数ペア:

[(1, 20553561), (3, 6851187), (7, 2936223), (9, 2283729), (17, 1209033), (21, 978741), (27, 761243), (51, 403011), (63, 326247), (119, 172719), (153, 134337), (189, 108749), (357, 57573), (459, 44779), (1071, 19191), (3213, 6397)]