20285408

素因数分解:

$2^5\times {\mathrm{11}}^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1$

素因数の和:89

約数の個数: 108

約数和(自身を含む): 49067424

約数和(自身を除く): 28782016

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 31, 32, 44, 52, 62, 88, 104, 121, 124, 143, 169, 176, 208, 242, 248, 286, 338, 341, 352, 403, 416, 484, 496, 572, 676, 682, 806, 968, 992, 1144, 1352, 1364, 1573, 1612, 1859, 1936, 2288, 2704, 2728, 3146, 3224, 3718, 3751, 3872, 4433, 4576, 5239, 5408, 5456, 6292, 6448, 7436, 7502, 8866, 10478, 10912, 12584, 12896, 14872, 15004, 17732, 20449, 20956, 25168, 29744, 30008, 35464, 40898, 41912, 48763, 50336, 57629, 59488, 60016, 70928, 81796, 83824, 97526, 115258, 120032, 141856, 163592, 167648, 195052, 230516, 327184, 390104, 461032, 633919, 654368, 780208, 922064, 1267838, 1560416, 1844128, 2535676, 5071352, 10142704, 20285408]

約数ペア:

[(1, 20285408), (2, 10142704), (4, 5071352), (8, 2535676), (11, 1844128), (13, 1560416), (16, 1267838), (22, 922064), (26, 780208), (31, 654368), (32, 633919), (44, 461032), (52, 390104), (62, 327184), (88, 230516), (104, 195052), (121, 167648), (124, 163592), (143, 141856), (169, 120032), (176, 115258), (208, 97526), (242, 83824), (248, 81796), (286, 70928), (338, 60016), (341, 59488), (352, 57629), (403, 50336), (416, 48763), (484, 41912), (496, 40898), (572, 35464), (676, 30008), (682, 29744), (806, 25168), (968, 20956), (992, 20449), (1144, 17732), (1352, 15004), (1364, 14872), (1573, 12896), (1612, 12584), (1859, 10912), (1936, 10478), (2288, 8866), (2704, 7502), (2728, 7436), (3146, 6448), (3224, 6292), (3718, 5456), (3751, 5408), (3872, 5239), (4433, 4576)]