21000810880

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{4687681}}^1$

素因数の和:4687707

約数の個数: 64

約数和(自身を含む): 57377227680

約数和(自身を除く): 36376416800

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, 280, 320, 448, 560, 640, 896, 1120, 2240, 4480, 4687681, 9375362, 18750724, 23438405, 32813767, 37501448, 46876810, 65627534, 75002896, 93753620, 131255068, 150005792, 164068835, 187507240, 262510136, 300011584, 328137670, 375014480, 525020272, 600023168, 656275340, 750028960, 1050040544, 1312550680, 1500057920, 2100081088, 2625101360, 3000115840, 4200162176, 5250202720, 10500405440, 21000810880]

約数ペア:

[(1, 21000810880), (2, 10500405440), (4, 5250202720), (5, 4200162176), (7, 3000115840), (8, 2625101360), (10, 2100081088), (14, 1500057920), (16, 1312550680), (20, 1050040544), (28, 750028960), (32, 656275340), (35, 600023168), (40, 525020272), (56, 375014480), (64, 328137670), (70, 300011584), (80, 262510136), (112, 187507240), (128, 164068835), (140, 150005792), (160, 131255068), (224, 93753620), (280, 75002896), (320, 65627534), (448, 46876810), (560, 37501448), (640, 32813767), (896, 23438405), (1120, 18750724), (2240, 9375362), (4480, 4687681)]