21179015

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1559}}^1$

素因数の和:1607

約数の個数: 32

約数和(自身を含む): 31449600

約数和(自身を除く): 10270585

約数列:

[1, 5, 11, 13, 19, 55, 65, 95, 143, 209, 247, 715, 1045, 1235, 1559, 2717, 7795, 13585, 17149, 20267, 29621, 85745, 101335, 148105, 222937, 325831, 385073, 1114685, 1629155, 1925365, 4235803, 21179015]

約数ペア:

[(1, 21179015), (5, 4235803), (11, 1925365), (13, 1629155), (19, 1114685), (55, 385073), (65, 325831), (95, 222937), (143, 148105), (209, 101335), (247, 85745), (715, 29621), (1045, 20267), (1235, 17149), (1559, 13585), (2717, 7795)]