21089835

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{197}}^1$

素因数の和:285

約数の個数: 64

約数和(自身を含む): 41247360

約数和(自身を除く): 20157525

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 61, 65, 117, 135, 183, 195, 197, 305, 351, 549, 585, 591, 793, 915, 985, 1647, 1755, 1773, 2379, 2561, 2745, 2955, 3965, 5319, 7137, 7683, 8235, 8865, 11895, 12017, 12805, 21411, 23049, 26595, 35685, 36051, 38415, 60085, 69147, 107055, 108153, 115245, 156221, 180255, 324459, 345735, 468663, 540765, 781105, 1405989, 1622295, 2343315, 4217967, 7029945, 21089835]

約数ペア:

[(1, 21089835), (3, 7029945), (5, 4217967), (9, 2343315), (13, 1622295), (15, 1405989), (27, 781105), (39, 540765), (45, 468663), (61, 345735), (65, 324459), (117, 180255), (135, 156221), (183, 115245), (195, 108153), (197, 107055), (305, 69147), (351, 60085), (549, 38415), (585, 36051), (591, 35685), (793, 26595), (915, 23049), (985, 21411), (1647, 12805), (1755, 12017), (1773, 11895), (2379, 8865), (2561, 8235), (2745, 7683), (2955, 7137), (3965, 5319)]