21646240

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{251}}^1$

素因数の和:291

約数の個数: 144

約数和(自身を含む): 65155104

約数和(自身を除く): 43508864

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 32, 35, 40, 44, 49, 55, 56, 70, 77, 80, 88, 98, 110, 112, 140, 154, 160, 176, 196, 220, 224, 245, 251, 280, 308, 352, 385, 392, 440, 490, 502, 539, 560, 616, 770, 784, 880, 980, 1004, 1078, 1120, 1232, 1255, 1540, 1568, 1757, 1760, 1960, 2008, 2156, 2464, 2510, 2695, 2761, 3080, 3514, 3920, 4016, 4312, 5020, 5390, 5522, 6160, 7028, 7840, 8032, 8624, 8785, 10040, 10780, 11044, 12299, 12320, 13805, 14056, 17248, 17570, 19327, 20080, 21560, 22088, 24598, 27610, 28112, 35140, 38654, 40160, 43120, 44176, 49196, 55220, 56224, 61495, 70280, 77308, 86240, 88352, 96635, 98392, 110440, 122990, 135289, 140560, 154616, 193270, 196784, 220880, 245980, 270578, 281120, 309232, 386540, 393568, 441760, 491960, 541156, 618464, 676445, 773080, 983920, 1082312, 1352890, 1546160, 1967840, 2164624, 2705780, 3092320, 4329248, 5411560, 10823120, 21646240]

約数ペア:

[(1, 21646240), (2, 10823120), (4, 5411560), (5, 4329248), (7, 3092320), (8, 2705780), (10, 2164624), (11, 1967840), (14, 1546160), (16, 1352890), (20, 1082312), (22, 983920), (28, 773080), (32, 676445), (35, 618464), (40, 541156), (44, 491960), (49, 441760), (55, 393568), (56, 386540), (70, 309232), (77, 281120), (80, 270578), (88, 245980), (98, 220880), (110, 196784), (112, 193270), (140, 154616), (154, 140560), (160, 135289), (176, 122990), (196, 110440), (220, 98392), (224, 96635), (245, 88352), (251, 86240), (280, 77308), (308, 70280), (352, 61495), (385, 56224), (392, 55220), (440, 49196), (490, 44176), (502, 43120), (539, 40160), (560, 38654), (616, 35140), (770, 28112), (784, 27610), (880, 24598), (980, 22088), (1004, 21560), (1078, 20080), (1120, 19327), (1232, 17570), (1255, 17248), (1540, 14056), (1568, 13805), (1757, 12320), (1760, 12299), (1960, 11044), (2008, 10780), (2156, 10040), (2464, 8785), (2510, 8624), (2695, 8032), (2761, 7840), (3080, 7028), (3514, 6160), (3920, 5522), (4016, 5390), (4312, 5020)]