19729521

素因数分解:

$3^3\times 7^1\times {\mathrm{139}}^1\times {\mathrm{751}}^1$

素因数の和:906

約数の個数: 32

約数和(自身を含む): 33689600

約数和(自身を除く): 13960079

約数列:

[1, 3, 7, 9, 21, 27, 63, 139, 189, 417, 751, 973, 1251, 2253, 2919, 3753, 5257, 6759, 8757, 15771, 20277, 26271, 47313, 104389, 141939, 313167, 730723, 939501, 2192169, 2818503, 6576507, 19729521]

約数ペア:

[(1, 19729521), (3, 6576507), (7, 2818503), (9, 2192169), (21, 939501), (27, 730723), (63, 313167), (139, 141939), (189, 104389), (417, 47313), (751, 26271), (973, 20277), (1251, 15771), (2253, 8757), (2919, 6759), (3753, 5257)]