21904688

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1987}}^1$

素因数の和:2061

約数の個数: 40

約数和(自身を含む): 46590768

約数和(自身を除く): 24686080

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 53, 104, 106, 208, 212, 424, 689, 848, 1378, 1987, 2756, 3974, 5512, 7948, 11024, 15896, 25831, 31792, 51662, 103324, 105311, 206648, 210622, 413296, 421244, 842488, 1369043, 1684976, 2738086, 5476172, 10952344, 21904688]

約数ペア:

[(1, 21904688), (2, 10952344), (4, 5476172), (8, 2738086), (13, 1684976), (16, 1369043), (26, 842488), (52, 421244), (53, 413296), (104, 210622), (106, 206648), (208, 105311), (212, 103324), (424, 51662), (689, 31792), (848, 25831), (1378, 15896), (1987, 11024), (2756, 7948), (3974, 5512)]