21381945

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{2333}}^1$

素因数の和:2401

約数の個数: 32

約数和(自身を含む): 37642752

約数和(自身を除く): 16260807

約数列:

[1, 3, 5, 13, 15, 39, 47, 65, 141, 195, 235, 611, 705, 1833, 2333, 3055, 6999, 9165, 11665, 30329, 34995, 90987, 109651, 151645, 328953, 454935, 548255, 1425463, 1644765, 4276389, 7127315, 21381945]

約数ペア:

[(1, 21381945), (3, 7127315), (5, 4276389), (13, 1644765), (15, 1425463), (39, 548255), (47, 454935), (65, 328953), (141, 151645), (195, 109651), (235, 90987), (611, 34995), (705, 30329), (1833, 11665), (2333, 9165), (3055, 6999)]