21313280

素因数分解:

$2^8\times 5^1\times {\mathrm{16651}}^1$

素因数の和:16672

約数の個数: 36

約数和(自身を含む): 51055032

約数和(自身を除く): 29741752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16651, 33302, 66604, 83255, 133208, 166510, 266416, 333020, 532832, 666040, 1065664, 1332080, 2131328, 2664160, 4262656, 5328320, 10656640, 21313280]

約数ペア:

[(1, 21313280), (2, 10656640), (4, 5328320), (5, 4262656), (8, 2664160), (10, 2131328), (16, 1332080), (20, 1065664), (32, 666040), (40, 532832), (64, 333020), (80, 266416), (128, 166510), (160, 133208), (256, 83255), (320, 66604), (640, 33302), (1280, 16651)]