21226520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{43}}^2$

素因数の和:145

約数の個数: 96

約数和(自身を含む): 57244320

約数和(自身を除く): 36017800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 41, 43, 56, 70, 82, 86, 140, 164, 172, 205, 215, 280, 287, 301, 328, 344, 410, 430, 574, 602, 820, 860, 1148, 1204, 1435, 1505, 1640, 1720, 1763, 1849, 2296, 2408, 2870, 3010, 3526, 3698, 5740, 6020, 7052, 7396, 8815, 9245, 11480, 12040, 12341, 12943, 14104, 14792, 17630, 18490, 24682, 25886, 35260, 36980, 49364, 51772, 61705, 64715, 70520, 73960, 75809, 98728, 103544, 123410, 129430, 151618, 246820, 258860, 303236, 379045, 493640, 517720, 530663, 606472, 758090, 1061326, 1516180, 2122652, 2653315, 3032360, 4245304, 5306630, 10613260, 21226520]

約数ペア:

[(1, 21226520), (2, 10613260), (4, 5306630), (5, 4245304), (7, 3032360), (8, 2653315), (10, 2122652), (14, 1516180), (20, 1061326), (28, 758090), (35, 606472), (40, 530663), (41, 517720), (43, 493640), (56, 379045), (70, 303236), (82, 258860), (86, 246820), (140, 151618), (164, 129430), (172, 123410), (205, 103544), (215, 98728), (280, 75809), (287, 73960), (301, 70520), (328, 64715), (344, 61705), (410, 51772), (430, 49364), (574, 36980), (602, 35260), (820, 25886), (860, 24682), (1148, 18490), (1204, 17630), (1435, 14792), (1505, 14104), (1640, 12943), (1720, 12341), (1763, 12040), (1849, 11480), (2296, 9245), (2408, 8815), (2870, 7396), (3010, 7052), (3526, 6020), (3698, 5740)]