21000306560

素因数分解:

$2^7\times 5^1\times {\mathrm{251}}^1\times {\mathrm{130729}}^1$

素因数の和:130999

約数の個数: 64

約数和(自身を含む): 50404258800

約数和(自身を除く): 29403952240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 251, 320, 502, 640, 1004, 1255, 2008, 2510, 4016, 5020, 8032, 10040, 16064, 20080, 32128, 40160, 80320, 130729, 160640, 261458, 522916, 653645, 1045832, 1307290, 2091664, 2614580, 4183328, 5229160, 8366656, 10458320, 16733312, 20916640, 32812979, 41833280, 65625958, 83666560, 131251916, 164064895, 262503832, 328129790, 525007664, 656259580, 1050015328, 1312519160, 2100030656, 2625038320, 4200061312, 5250076640, 10500153280, 21000306560]

約数ペア:

[(1, 21000306560), (2, 10500153280), (4, 5250076640), (5, 4200061312), (8, 2625038320), (10, 2100030656), (16, 1312519160), (20, 1050015328), (32, 656259580), (40, 525007664), (64, 328129790), (80, 262503832), (128, 164064895), (160, 131251916), (251, 83666560), (320, 65625958), (502, 41833280), (640, 32812979), (1004, 20916640), (1255, 16733312), (2008, 10458320), (2510, 8366656), (4016, 5229160), (5020, 4183328), (8032, 2614580), (10040, 2091664), (16064, 1307290), (20080, 1045832), (32128, 653645), (40160, 522916), (80320, 261458), (130729, 160640)]