21296005

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{227}}^1\times {\mathrm{647}}^1$

素因数の和:908

約数の個数: 16

約数和(自身を含む): 26593920

約数和(自身を除く): 5297915

約数列:

[1, 5, 29, 145, 227, 647, 1135, 3235, 6583, 18763, 32915, 93815, 146869, 734345, 4259201, 21296005]

約数ペア:

[(1, 21296005), (5, 4259201), (29, 734345), (145, 146869), (227, 93815), (647, 32915), (1135, 18763), (3235, 6583)]