25516215

素因数分解:

$3^5\times 5^1\times {\mathrm{21001}}^1$

素因数の和:21021

約数の個数: 24

約数和(自身を含む): 45868368

約数和(自身を除く): 20352153

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 21001, 63003, 105005, 189009, 315015, 567027, 945045, 1701081, 2835135, 5103243, 8505405, 25516215]

約数ペア:

[(1, 25516215), (3, 8505405), (5, 5103243), (9, 2835135), (15, 1701081), (27, 945045), (45, 567027), (81, 315015), (135, 189009), (243, 105005), (405, 63003), (1215, 21001)]