21513975

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{953}}^1$

素因数の和:1016

約数の個数: 48

約数和(自身を含む): 41640192

約数和(自身を除く): 20126217

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 43, 75, 105, 129, 175, 215, 301, 525, 645, 903, 953, 1075, 1505, 2859, 3225, 4515, 4765, 6671, 7525, 14295, 20013, 22575, 23825, 33355, 40979, 71475, 100065, 122937, 166775, 204895, 286853, 500325, 614685, 860559, 1024475, 1434265, 3073425, 4302795, 7171325, 21513975]

約数ペア:

[(1, 21513975), (3, 7171325), (5, 4302795), (7, 3073425), (15, 1434265), (21, 1024475), (25, 860559), (35, 614685), (43, 500325), (75, 286853), (105, 204895), (129, 166775), (175, 122937), (215, 100065), (301, 71475), (525, 40979), (645, 33355), (903, 23825), (953, 22575), (1075, 20013), (1505, 14295), (2859, 7525), (3225, 6671), (4515, 4765)]