21860985

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{33893}}^1$

素因数の和:33944

約数の個数: 16

約数和(自身を含む): 35792064

約数和(自身を除く): 13931079

約数列:

[1, 3, 5, 15, 43, 129, 215, 645, 33893, 101679, 169465, 508395, 1457399, 4372197, 7286995, 21860985]

約数ペア:

[(1, 21860985), (3, 7286995), (5, 4372197), (15, 1457399), (43, 508395), (129, 169465), (215, 101679), (645, 33893)]