21618495

素因数分解:

$3^8\times 5^1\times {\mathrm{659}}^1$

素因数の和:688

約数の個数: 36

約数和(自身を含む): 38970360

約数和(自身を除く): 17351865

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 659, 729, 1215, 1977, 2187, 3295, 3645, 5931, 6561, 9885, 10935, 17793, 29655, 32805, 53379, 88965, 160137, 266895, 480411, 800685, 1441233, 2402055, 4323699, 7206165, 21618495]

約数ペア:

[(1, 21618495), (3, 7206165), (5, 4323699), (9, 2402055), (15, 1441233), (27, 800685), (45, 480411), (81, 266895), (135, 160137), (243, 88965), (405, 53379), (659, 32805), (729, 29655), (1215, 17793), (1977, 10935), (2187, 9885), (3295, 6561), (3645, 5931)]