20985800

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{9539}}^1$

素因数の和:9566

約数の個数: 48

約数和(自身を含む): 53233200

約数和(自身を除く): 32247400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 88, 100, 110, 200, 220, 275, 440, 550, 1100, 2200, 9539, 19078, 38156, 47695, 76312, 95390, 104929, 190780, 209858, 238475, 381560, 419716, 476950, 524645, 839432, 953900, 1049290, 1907800, 2098580, 2623225, 4197160, 5246450, 10492900, 20985800]

約数ペア:

[(1, 20985800), (2, 10492900), (4, 5246450), (5, 4197160), (8, 2623225), (10, 2098580), (11, 1907800), (20, 1049290), (22, 953900), (25, 839432), (40, 524645), (44, 476950), (50, 419716), (55, 381560), (88, 238475), (100, 209858), (110, 190780), (200, 104929), (220, 95390), (275, 76312), (440, 47695), (550, 38156), (1100, 19078), (2200, 9539)]