21040730

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{2029}}^1$

素因数の和:2114

約数の個数: 32

約数和(自身を含む): 40778640

約数和(自身を除く): 19737910

約数列:

[1, 2, 5, 10, 17, 34, 61, 85, 122, 170, 305, 610, 1037, 2029, 2074, 4058, 5185, 10145, 10370, 20290, 34493, 68986, 123769, 172465, 247538, 344930, 618845, 1237690, 2104073, 4208146, 10520365, 21040730]

約数ペア:

[(1, 21040730), (2, 10520365), (5, 4208146), (10, 2104073), (17, 1237690), (34, 618845), (61, 344930), (85, 247538), (122, 172465), (170, 123769), (305, 68986), (610, 34493), (1037, 20290), (2029, 10370), (2074, 10145), (4058, 5185)]