18651969

素因数分解:

$3^2\times 7^1\times {\mathrm{149}}^1\times {\mathrm{1987}}^1$

素因数の和:2149

約数の個数: 24

約数和(自身を含む): 31012800

約数和(自身を除く): 12360831

約数列:

[1, 3, 7, 9, 21, 63, 149, 447, 1043, 1341, 1987, 3129, 5961, 9387, 13909, 17883, 41727, 125181, 296063, 888189, 2072441, 2664567, 6217323, 18651969]

約数ペア:

[(1, 18651969), (3, 6217323), (7, 2664567), (9, 2072441), (21, 888189), (63, 296063), (149, 125181), (447, 41727), (1043, 17883), (1341, 13909), (1987, 9387), (3129, 5961)]