20181921

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{1549}}^1$

素因数の和:1696

約数の個数: 16

約数和(自身を含む): 27825600

約数和(自身を除く): 7643679

約数列:

[1, 3, 43, 101, 129, 303, 1549, 4343, 4647, 13029, 66607, 156449, 199821, 469347, 6727307, 20181921]

約数ペア:

[(1, 20181921), (3, 6727307), (43, 469347), (101, 199821), (129, 156449), (303, 66607), (1549, 13029), (4343, 4647)]