198765

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{631}}^1$

素因数の和:649

約数の個数: 24

約数和(自身を含む): 394368

約数和(自身を除く): 195603

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 631, 1893, 3155, 4417, 5679, 9465, 13251, 22085, 28395, 39753, 66255, 198765]

約数ペア:

[(1, 198765), (3, 66255), (5, 39753), (7, 28395), (9, 22085), (15, 13251), (21, 9465), (35, 5679), (45, 4417), (63, 3155), (105, 1893), (315, 631)]