21001815

素因数分解:

$3^3\times 5^1\times {\mathrm{155569}}^1$

素因数の和:155583

約数の個数: 16

約数和(自身を含む): 37336800

約数和(自身を除く): 16334985

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 155569, 466707, 777845, 1400121, 2333535, 4200363, 7000605, 21001815]

約数ペア:

[(1, 21001815), (3, 7000605), (5, 4200363), (9, 2333535), (15, 1400121), (27, 777845), (45, 466707), (135, 155569)]