21415995

素因数分解:

$3^4\times 5^1\times {\mathrm{52879}}^1$

素因数の和:52896

約数の個数: 20

約数和(自身を含む): 38390880

約数和(自身を除く): 16974885

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52879, 158637, 264395, 475911, 793185, 1427733, 2379555, 4283199, 7138665, 21415995]

約数ペア:

[(1, 21415995), (3, 7138665), (5, 4283199), (9, 2379555), (15, 1427733), (27, 793185), (45, 475911), (81, 264395), (135, 158637), (405, 52879)]