21061120

素因数分解:

$2^9\times 5^1\times {\mathrm{19}}^1\times {\mathrm{433}}^1$

素因数の和:475

約数の個数: 80

約数和(自身を含む): 53277840

約数和(自身を除く): 32216720

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 256, 304, 320, 380, 433, 512, 608, 640, 760, 866, 1216, 1280, 1520, 1732, 2165, 2432, 2560, 3040, 3464, 4330, 4864, 6080, 6928, 8227, 8660, 9728, 12160, 13856, 16454, 17320, 24320, 27712, 32908, 34640, 41135, 48640, 55424, 65816, 69280, 82270, 110848, 131632, 138560, 164540, 221696, 263264, 277120, 329080, 526528, 554240, 658160, 1053056, 1108480, 1316320, 2106112, 2632640, 4212224, 5265280, 10530560, 21061120]

約数ペア:

[(1, 21061120), (2, 10530560), (4, 5265280), (5, 4212224), (8, 2632640), (10, 2106112), (16, 1316320), (19, 1108480), (20, 1053056), (32, 658160), (38, 554240), (40, 526528), (64, 329080), (76, 277120), (80, 263264), (95, 221696), (128, 164540), (152, 138560), (160, 131632), (190, 110848), (256, 82270), (304, 69280), (320, 65816), (380, 55424), (433, 48640), (512, 41135), (608, 34640), (640, 32908), (760, 27712), (866, 24320), (1216, 17320), (1280, 16454), (1520, 13856), (1732, 12160), (2165, 9728), (2432, 8660), (2560, 8227), (3040, 6928), (3464, 6080), (4330, 4864)]