21280

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{19}}^1$

素因数の和:41

約数の個数: 48

約数和(自身を含む): 60480

約数和(自身を除く): 39200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 32, 35, 38, 40, 56, 70, 76, 80, 95, 112, 133, 140, 152, 160, 190, 224, 266, 280, 304, 380, 532, 560, 608, 665, 760, 1064, 1120, 1330, 1520, 2128, 2660, 3040, 4256, 5320, 10640, 21280]

約数ペア:

[(1, 21280), (2, 10640), (4, 5320), (5, 4256), (7, 3040), (8, 2660), (10, 2128), (14, 1520), (16, 1330), (19, 1120), (20, 1064), (28, 760), (32, 665), (35, 608), (38, 560), (40, 532), (56, 380), (70, 304), (76, 280), (80, 266), (95, 224), (112, 190), (133, 160), (140, 152)]