18205125860

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{521}}^1\times {\mathrm{991}}^1$

素因数の和:1605

約数の個数: 96

約数和(自身を含む): 40191427584

約数和(自身を除く): 21986301724

約数列:

[1, 2, 4, 5, 10, 20, 41, 43, 82, 86, 164, 172, 205, 215, 410, 430, 521, 820, 860, 991, 1042, 1763, 1982, 2084, 2605, 3526, 3964, 4955, 5210, 7052, 8815, 9910, 10420, 17630, 19820, 21361, 22403, 35260, 40631, 42613, 42722, 44806, 81262, 85226, 85444, 89612, 106805, 112015, 162524, 170452, 203155, 213065, 213610, 224030, 406310, 426130, 427220, 448060, 516311, 812620, 852260, 918523, 1032622, 1747133, 1837046, 2065244, 2581555, 3494266, 3674092, 4592615, 5163110, 6988532, 8735665, 9185230, 10326220, 17471330, 18370460, 21168751, 22201373, 34942660, 42337502, 44402746, 84675004, 88805492, 105843755, 111006865, 211687510, 222013730, 423375020, 444027460, 910256293, 1820512586, 3641025172, 4551281465, 9102562930, 18205125860]

約数ペア:

[(1, 18205125860), (2, 9102562930), (4, 4551281465), (5, 3641025172), (10, 1820512586), (20, 910256293), (41, 444027460), (43, 423375020), (82, 222013730), (86, 211687510), (164, 111006865), (172, 105843755), (205, 88805492), (215, 84675004), (410, 44402746), (430, 42337502), (521, 34942660), (820, 22201373), (860, 21168751), (991, 18370460), (1042, 17471330), (1763, 10326220), (1982, 9185230), (2084, 8735665), (2605, 6988532), (3526, 5163110), (3964, 4592615), (4955, 3674092), (5210, 3494266), (7052, 2581555), (8815, 2065244), (9910, 1837046), (10420, 1747133), (17630, 1032622), (19820, 918523), (21361, 852260), (22403, 812620), (35260, 516311), (40631, 448060), (42613, 427220), (42722, 426130), (44806, 406310), (81262, 224030), (85226, 213610), (85444, 213065), (89612, 203155), (106805, 170452), (112015, 162524)]