20625920

素因数分解:

$2^9\times 5^1\times 7^1\times {\mathrm{1151}}^1$

素因数の和:1181

約数の個数: 80

約数和(自身を含む): 56567808

約数和(自身を除く): 35941888

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 256, 280, 320, 448, 512, 560, 640, 896, 1120, 1151, 1280, 1792, 2240, 2302, 2560, 3584, 4480, 4604, 5755, 8057, 8960, 9208, 11510, 16114, 17920, 18416, 23020, 32228, 36832, 40285, 46040, 64456, 73664, 80570, 92080, 128912, 147328, 161140, 184160, 257824, 294656, 322280, 368320, 515648, 589312, 644560, 736640, 1031296, 1289120, 1473280, 2062592, 2578240, 2946560, 4125184, 5156480, 10312960, 20625920]

約数ペア:

[(1, 20625920), (2, 10312960), (4, 5156480), (5, 4125184), (7, 2946560), (8, 2578240), (10, 2062592), (14, 1473280), (16, 1289120), (20, 1031296), (28, 736640), (32, 644560), (35, 589312), (40, 515648), (56, 368320), (64, 322280), (70, 294656), (80, 257824), (112, 184160), (128, 161140), (140, 147328), (160, 128912), (224, 92080), (256, 80570), (280, 73664), (320, 64456), (448, 46040), (512, 40285), (560, 36832), (640, 32228), (896, 23020), (1120, 18416), (1151, 17920), (1280, 16114), (1792, 11510), (2240, 9208), (2302, 8960), (2560, 8057), (3584, 5755), (4480, 4604)]