81717860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{991}}^1$

素因数の和:1057

約数の個数: 96

約数和(自身を含む): 213319680

約数和(自身を除く): 131601820

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 31, 35, 38, 62, 70, 76, 95, 124, 133, 140, 155, 190, 217, 266, 310, 380, 434, 532, 589, 620, 665, 868, 991, 1085, 1178, 1330, 1982, 2170, 2356, 2660, 2945, 3964, 4123, 4340, 4955, 5890, 6937, 8246, 9910, 11780, 13874, 16492, 18829, 19820, 20615, 27748, 30721, 34685, 37658, 41230, 61442, 69370, 75316, 82460, 94145, 122884, 131803, 138740, 153605, 188290, 215047, 263606, 307210, 376580, 430094, 527212, 583699, 614420, 659015, 860188, 1075235, 1167398, 1318030, 2150470, 2334796, 2636060, 2918495, 4085893, 4300940, 5836990, 8171786, 11673980, 16343572, 20429465, 40858930, 81717860]

約数ペア:

[(1, 81717860), (2, 40858930), (4, 20429465), (5, 16343572), (7, 11673980), (10, 8171786), (14, 5836990), (19, 4300940), (20, 4085893), (28, 2918495), (31, 2636060), (35, 2334796), (38, 2150470), (62, 1318030), (70, 1167398), (76, 1075235), (95, 860188), (124, 659015), (133, 614420), (140, 583699), (155, 527212), (190, 430094), (217, 376580), (266, 307210), (310, 263606), (380, 215047), (434, 188290), (532, 153605), (589, 138740), (620, 131803), (665, 122884), (868, 94145), (991, 82460), (1085, 75316), (1178, 69370), (1330, 61442), (1982, 41230), (2170, 37658), (2356, 34685), (2660, 30721), (2945, 27748), (3964, 20615), (4123, 19820), (4340, 18829), (4955, 16492), (5890, 13874), (6937, 11780), (8246, 9910)]