21617685

素因数分解:

$3^4\times 5^1\times {\mathrm{53377}}^1$

素因数の和:53394

約数の個数: 20

約数和(自身を含む): 38752428

約数和(自身を除く): 17134743

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53377, 160131, 266885, 480393, 800655, 1441179, 2401965, 4323537, 7205895, 21617685]

約数ペア:

[(1, 21617685), (3, 7205895), (5, 4323537), (9, 2401965), (15, 1441179), (27, 800655), (45, 480393), (81, 266885), (135, 160131), (405, 53377)]