156800

素因数分解:

$2^7\times 5^2\times 7^2$

素因数の和:38

約数の個数: 72

約数和(自身を含む): 450585

約数和(自身を除く): 293785

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 49, 50, 56, 64, 70, 80, 98, 100, 112, 128, 140, 160, 175, 196, 200, 224, 245, 280, 320, 350, 392, 400, 448, 490, 560, 640, 700, 784, 800, 896, 980, 1120, 1225, 1400, 1568, 1600, 1960, 2240, 2450, 2800, 3136, 3200, 3920, 4480, 4900, 5600, 6272, 7840, 9800, 11200, 15680, 19600, 22400, 31360, 39200, 78400, 156800]

約数ペア:

[(1, 156800), (2, 78400), (4, 39200), (5, 31360), (7, 22400), (8, 19600), (10, 15680), (14, 11200), (16, 9800), (20, 7840), (25, 6272), (28, 5600), (32, 4900), (35, 4480), (40, 3920), (49, 3200), (50, 3136), (56, 2800), (64, 2450), (70, 2240), (80, 1960), (98, 1600), (100, 1568), (112, 1400), (128, 1225), (140, 1120), (160, 980), (175, 896), (196, 800), (200, 784), (224, 700), (245, 640), (280, 560), (320, 490), (350, 448), (392, 400)]