28081900

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{521}}^1$

素因数の和:560

約数の個数: 108

約数和(自身を含む): 77479416

約数和(自身を除く): 49397516

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 25, 28, 35, 44, 49, 50, 55, 70, 77, 98, 100, 110, 140, 154, 175, 196, 220, 245, 275, 308, 350, 385, 490, 521, 539, 550, 700, 770, 980, 1042, 1078, 1100, 1225, 1540, 1925, 2084, 2156, 2450, 2605, 2695, 3647, 3850, 4900, 5210, 5390, 5731, 7294, 7700, 10420, 10780, 11462, 13025, 13475, 14588, 18235, 22924, 25529, 26050, 26950, 28655, 36470, 40117, 51058, 52100, 53900, 57310, 72940, 80234, 91175, 102116, 114620, 127645, 143275, 160468, 182350, 200585, 255290, 280819, 286550, 364700, 401170, 510580, 561638, 573100, 638225, 802340, 1002925, 1123276, 1276450, 1404095, 2005850, 2552900, 2808190, 4011700, 5616380, 7020475, 14040950, 28081900]

約数ペア:

[(1, 28081900), (2, 14040950), (4, 7020475), (5, 5616380), (7, 4011700), (10, 2808190), (11, 2552900), (14, 2005850), (20, 1404095), (22, 1276450), (25, 1123276), (28, 1002925), (35, 802340), (44, 638225), (49, 573100), (50, 561638), (55, 510580), (70, 401170), (77, 364700), (98, 286550), (100, 280819), (110, 255290), (140, 200585), (154, 182350), (175, 160468), (196, 143275), (220, 127645), (245, 114620), (275, 102116), (308, 91175), (350, 80234), (385, 72940), (490, 57310), (521, 53900), (539, 52100), (550, 51058), (700, 40117), (770, 36470), (980, 28655), (1042, 26950), (1078, 26050), (1100, 25529), (1225, 22924), (1540, 18235), (1925, 14588), (2084, 13475), (2156, 13025), (2450, 11462), (2605, 10780), (2695, 10420), (3647, 7700), (3850, 7294), (4900, 5731), (5210, 5390)]