21189285

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1249}}^1$

素因数の和:1302

約数の個数: 48

約数和(自身を含む): 40950000

約数和(自身を除く): 19760715

約数列:

[1, 3, 5, 9, 13, 15, 29, 39, 45, 65, 87, 117, 145, 195, 261, 377, 435, 585, 1131, 1249, 1305, 1885, 3393, 3747, 5655, 6245, 11241, 16237, 16965, 18735, 36221, 48711, 56205, 81185, 108663, 146133, 181105, 243555, 325989, 470873, 543315, 730665, 1412619, 1629945, 2354365, 4237857, 7063095, 21189285]

約数ペア:

[(1, 21189285), (3, 7063095), (5, 4237857), (9, 2354365), (13, 1629945), (15, 1412619), (29, 730665), (39, 543315), (45, 470873), (65, 325989), (87, 243555), (117, 181105), (145, 146133), (195, 108663), (261, 81185), (377, 56205), (435, 48711), (585, 36221), (1131, 18735), (1249, 16965), (1305, 16237), (1885, 11241), (3393, 6245), (3747, 5655)]