20642720

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{2633}}^1$

素因数の和:2662

約数の個数: 72

約数和(自身を含む): 56752164

約数和(自身を除く): 36109444

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 2633, 3920, 5266, 7840, 10532, 13165, 18431, 21064, 26330, 36862, 42128, 52660, 73724, 84256, 92155, 105320, 129017, 147448, 184310, 210640, 258034, 294896, 368620, 421280, 516068, 589792, 645085, 737240, 1032136, 1290170, 1474480, 2064272, 2580340, 2948960, 4128544, 5160680, 10321360, 20642720]

約数ペア:

[(1, 20642720), (2, 10321360), (4, 5160680), (5, 4128544), (7, 2948960), (8, 2580340), (10, 2064272), (14, 1474480), (16, 1290170), (20, 1032136), (28, 737240), (32, 645085), (35, 589792), (40, 516068), (49, 421280), (56, 368620), (70, 294896), (80, 258034), (98, 210640), (112, 184310), (140, 147448), (160, 129017), (196, 105320), (224, 92155), (245, 84256), (280, 73724), (392, 52660), (490, 42128), (560, 36862), (784, 26330), (980, 21064), (1120, 18431), (1568, 13165), (1960, 10532), (2633, 7840), (3920, 5266)]