21091520

素因数分解:

$2^6\times 5^1\times {\mathrm{19}}^1\times {\mathrm{3469}}^1$

素因数の和:3505

約数の個数: 56

約数和(自身を含む): 52882800

約数和(自身を除く): 31791280

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 152, 160, 190, 304, 320, 380, 608, 760, 1216, 1520, 3040, 3469, 6080, 6938, 13876, 17345, 27752, 34690, 55504, 65911, 69380, 111008, 131822, 138760, 222016, 263644, 277520, 329555, 527288, 555040, 659110, 1054576, 1110080, 1318220, 2109152, 2636440, 4218304, 5272880, 10545760, 21091520]

約数ペア:

[(1, 21091520), (2, 10545760), (4, 5272880), (5, 4218304), (8, 2636440), (10, 2109152), (16, 1318220), (19, 1110080), (20, 1054576), (32, 659110), (38, 555040), (40, 527288), (64, 329555), (76, 277520), (80, 263644), (95, 222016), (152, 138760), (160, 131822), (190, 111008), (304, 69380), (320, 65911), (380, 55504), (608, 34690), (760, 27752), (1216, 17345), (1520, 13876), (3040, 6938), (3469, 6080)]