20601440

素因数分解:

$2^5\times 5^1\times {\mathrm{331}}^1\times {\mathrm{389}}^1$

素因数の和:735

約数の個数: 48

約数和(自身を含む): 48943440

約数和(自身を除く): 28342000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 331, 389, 662, 778, 1324, 1556, 1655, 1945, 2648, 3112, 3310, 3890, 5296, 6224, 6620, 7780, 10592, 12448, 13240, 15560, 26480, 31120, 52960, 62240, 128759, 257518, 515036, 643795, 1030072, 1287590, 2060144, 2575180, 4120288, 5150360, 10300720, 20601440]

約数ペア:

[(1, 20601440), (2, 10300720), (4, 5150360), (5, 4120288), (8, 2575180), (10, 2060144), (16, 1287590), (20, 1030072), (32, 643795), (40, 515036), (80, 257518), (160, 128759), (331, 62240), (389, 52960), (662, 31120), (778, 26480), (1324, 15560), (1556, 13240), (1655, 12448), (1945, 10592), (2648, 7780), (3112, 6620), (3310, 6224), (3890, 5296)]