21255920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37957}}^1$

素因数の和:37977

約数の個数: 40

約数和(自身を含む): 56481504

約数和(自身を除く): 35225584

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 37957, 75914, 151828, 189785, 265699, 303656, 379570, 531398, 607312, 759140, 1062796, 1328495, 1518280, 2125592, 2656990, 3036560, 4251184, 5313980, 10627960, 21255920]

約数ペア:

[(1, 21255920), (2, 10627960), (4, 5313980), (5, 4251184), (7, 3036560), (8, 2656990), (10, 2125592), (14, 1518280), (16, 1328495), (20, 1062796), (28, 759140), (35, 607312), (40, 531398), (56, 379570), (70, 303656), (80, 265699), (112, 189785), (140, 151828), (280, 75914), (560, 37957)]