51388640

素因数分解:

$2^5\times 5^1\times {\mathrm{509}}^1\times {\mathrm{631}}^1$

素因数の和:1155

約数の個数: 48

約数和(自身を含む): 121836960

約数和(自身を除く): 70448320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 509, 631, 1018, 1262, 2036, 2524, 2545, 3155, 4072, 5048, 5090, 6310, 8144, 10096, 10180, 12620, 16288, 20192, 20360, 25240, 40720, 50480, 81440, 100960, 321179, 642358, 1284716, 1605895, 2569432, 3211790, 5138864, 6423580, 10277728, 12847160, 25694320, 51388640]

約数ペア:

[(1, 51388640), (2, 25694320), (4, 12847160), (5, 10277728), (8, 6423580), (10, 5138864), (16, 3211790), (20, 2569432), (32, 1605895), (40, 1284716), (80, 642358), (160, 321179), (509, 100960), (631, 81440), (1018, 50480), (1262, 40720), (2036, 25240), (2524, 20360), (2545, 20192), (3155, 16288), (4072, 12620), (5048, 10180), (5090, 10096), (6310, 8144)]