20825504

素因数分解:

$2^5\times 7^1\times {\mathrm{239}}^1\times {\mathrm{389}}^1$

素因数の和:645

約数の個数: 48

約数和(自身を含む): 47174400

約数和(自身を除く): 26348896

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 112, 224, 239, 389, 478, 778, 956, 1556, 1673, 1912, 2723, 3112, 3346, 3824, 5446, 6224, 6692, 7648, 10892, 12448, 13384, 21784, 26768, 43568, 53536, 87136, 92971, 185942, 371884, 650797, 743768, 1301594, 1487536, 2603188, 2975072, 5206376, 10412752, 20825504]

約数ペア:

[(1, 20825504), (2, 10412752), (4, 5206376), (7, 2975072), (8, 2603188), (14, 1487536), (16, 1301594), (28, 743768), (32, 650797), (56, 371884), (112, 185942), (224, 92971), (239, 87136), (389, 53536), (478, 43568), (778, 26768), (956, 21784), (1556, 13384), (1673, 12448), (1912, 10892), (2723, 7648), (3112, 6692), (3346, 6224), (3824, 5446)]