20403315

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{179}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 37908000

約数和(自身を除く): 17504685

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 149, 153, 179, 255, 447, 537, 745, 765, 895, 1341, 1611, 2235, 2533, 2685, 3043, 6705, 7599, 8055, 9129, 12665, 15215, 22797, 26671, 27387, 37995, 45645, 80013, 113985, 133355, 136935, 240039, 400065, 453407, 1200195, 1360221, 2267035, 4080663, 6801105, 20403315]

約数ペア:

[(1, 20403315), (3, 6801105), (5, 4080663), (9, 2267035), (15, 1360221), (17, 1200195), (45, 453407), (51, 400065), (85, 240039), (149, 136935), (153, 133355), (179, 113985), (255, 80013), (447, 45645), (537, 37995), (745, 27387), (765, 26671), (895, 22797), (1341, 15215), (1611, 12665), (2235, 9129), (2533, 8055), (2685, 7599), (3043, 6705)]