20761475

素因数分解:

$5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:180

約数の個数: 48

約数和(自身を含む): 31426560

約数和(自身を除く): 10665085

約数列:

[1, 5, 7, 25, 31, 35, 43, 89, 155, 175, 215, 217, 301, 445, 623, 775, 1075, 1085, 1333, 1505, 2225, 2759, 3115, 3827, 5425, 6665, 7525, 9331, 13795, 15575, 19135, 19313, 26789, 33325, 46655, 68975, 95675, 96565, 118637, 133945, 233275, 482825, 593185, 669725, 830459, 2965925, 4152295, 20761475]

約数ペア:

[(1, 20761475), (5, 4152295), (7, 2965925), (25, 830459), (31, 669725), (35, 593185), (43, 482825), (89, 233275), (155, 133945), (175, 118637), (215, 96565), (217, 95675), (301, 68975), (445, 46655), (623, 33325), (775, 26789), (1075, 19313), (1085, 19135), (1333, 15575), (1505, 13795), (2225, 9331), (2759, 7525), (3115, 6665), (3827, 5425)]