21805940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83869}}^1$

素因数の和:83891

約数の個数: 24

約数和(自身を含む): 49315560

約数和(自身を除く): 27509620

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 83869, 167738, 335476, 419345, 838690, 1090297, 1677380, 2180594, 4361188, 5451485, 10902970, 21805940]

約数ペア:

[(1, 21805940), (2, 10902970), (4, 5451485), (5, 4361188), (10, 2180594), (13, 1677380), (20, 1090297), (26, 838690), (52, 419345), (65, 335476), (130, 167738), (260, 83869)]