21282008

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{4099}}^1$

素因数の和:4175

約数の個数: 32

約数和(自身を含む): 44280000

約数和(自身を除く): 22997992

約数列:

[1, 2, 4, 8, 11, 22, 44, 59, 88, 118, 236, 472, 649, 1298, 2596, 4099, 5192, 8198, 16396, 32792, 45089, 90178, 180356, 241841, 360712, 483682, 967364, 1934728, 2660251, 5320502, 10641004, 21282008]

約数ペア:

[(1, 21282008), (2, 10641004), (4, 5320502), (8, 2660251), (11, 1934728), (22, 967364), (44, 483682), (59, 360712), (88, 241841), (118, 180356), (236, 90178), (472, 45089), (649, 32792), (1298, 16396), (2596, 8198), (4099, 5192)]