21605120

素因数分解:

$2^8\times 5^1\times {\mathrm{16879}}^1$

素因数の和:16900

約数の個数: 36

約数和(自身を含む): 51754080

約数和(自身を除く): 30148960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16879, 33758, 67516, 84395, 135032, 168790, 270064, 337580, 540128, 675160, 1080256, 1350320, 2160512, 2700640, 4321024, 5401280, 10802560, 21605120]

約数ペア:

[(1, 21605120), (2, 10802560), (4, 5401280), (5, 4321024), (8, 2700640), (10, 2160512), (16, 1350320), (20, 1080256), (32, 675160), (40, 540128), (64, 337580), (80, 270064), (128, 168790), (160, 135032), (256, 84395), (320, 67516), (640, 33758), (1280, 16879)]