20521755

素因数分解:

$3^4\times 5^1\times {\mathrm{50671}}^1$

素因数の和:50688

約数の個数: 20

約数和(自身を含む): 36787872

約数和(自身を除く): 16266117

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 50671, 152013, 253355, 456039, 760065, 1368117, 2280195, 4104351, 6840585, 20521755]

約数ペア:

[(1, 20521755), (3, 6840585), (5, 4104351), (9, 2280195), (15, 1368117), (27, 760065), (45, 456039), (81, 253355), (135, 152013), (405, 50671)]