20395180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1669}}^1$

素因数の和:1738

約数の個数: 48

約数和(自身を含む): 47134080

約数和(自身を除く): 26738900

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 47, 52, 65, 94, 130, 188, 235, 260, 470, 611, 940, 1222, 1669, 2444, 3055, 3338, 6110, 6676, 8345, 12220, 16690, 21697, 33380, 43394, 78443, 86788, 108485, 156886, 216970, 313772, 392215, 433940, 784430, 1019759, 1568860, 2039518, 4079036, 5098795, 10197590, 20395180]

約数ペア:

[(1, 20395180), (2, 10197590), (4, 5098795), (5, 4079036), (10, 2039518), (13, 1568860), (20, 1019759), (26, 784430), (47, 433940), (52, 392215), (65, 313772), (94, 216970), (130, 156886), (188, 108485), (235, 86788), (260, 78443), (470, 43394), (611, 33380), (940, 21697), (1222, 16690), (1669, 12220), (2444, 8345), (3055, 6676), (3338, 6110)]