18745839

素因数分解:

$3^2\times 7^1\times {\mathrm{149}}^1\times {\mathrm{1997}}^1$

素因数の和:2159

約数の個数: 24

約数和(自身を含む): 31168800

約数和(自身を除く): 12422961

約数列:

[1, 3, 7, 9, 21, 63, 149, 447, 1043, 1341, 1997, 3129, 5991, 9387, 13979, 17973, 41937, 125811, 297553, 892659, 2082871, 2677977, 6248613, 18745839]

約数ペア:

[(1, 18745839), (3, 6248613), (7, 2677977), (9, 2082871), (21, 892659), (63, 297553), (149, 125811), (447, 41937), (1043, 17973), (1341, 13979), (1997, 9387), (3129, 5991)]