20998719

素因数分解:

$3^2\times 7^1\times {\mathrm{149}}^1\times {\mathrm{2237}}^1$

素因数の和:2399

約数の個数: 24

約数和(自身を含む): 34912800

約数和(自身を除く): 13914081

約数列:

[1, 3, 7, 9, 21, 63, 149, 447, 1043, 1341, 2237, 3129, 6711, 9387, 15659, 20133, 46977, 140931, 333313, 999939, 2333191, 2999817, 6999573, 20998719]

約数ペア:

[(1, 20998719), (3, 6999573), (7, 2999817), (9, 2333191), (21, 999939), (63, 333313), (149, 140931), (447, 46977), (1043, 20133), (1341, 15659), (2237, 9387), (3129, 6711)]