81623620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:126

約数の個数: 144

約数和(自身を含む): 206599680

約数和(自身を除く): 124976060

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 31, 38, 41, 52, 62, 65, 76, 82, 95, 124, 130, 155, 164, 169, 190, 205, 247, 260, 310, 338, 380, 403, 410, 494, 533, 589, 620, 676, 779, 806, 820, 845, 988, 1066, 1178, 1235, 1271, 1558, 1612, 1690, 2015, 2132, 2356, 2470, 2542, 2665, 2945, 3116, 3211, 3380, 3895, 4030, 4940, 5084, 5239, 5330, 5890, 6355, 6422, 6929, 7657, 7790, 8060, 10127, 10478, 10660, 11780, 12710, 12844, 13858, 15314, 15580, 16055, 16523, 20254, 20956, 24149, 25420, 26195, 27716, 30628, 32110, 33046, 34645, 38285, 40508, 48298, 50635, 52390, 64220, 66092, 69290, 76570, 82615, 96596, 99541, 101270, 104780, 120745, 131651, 138580, 153140, 165230, 199082, 202540, 214799, 241490, 263302, 313937, 330460, 398164, 429598, 482980, 497705, 526604, 627874, 658255, 859196, 995410, 1073995, 1255748, 1316510, 1569685, 1990820, 2147990, 2633020, 3139370, 4081181, 4295980, 6278740, 8162362, 16324724, 20405905, 40811810, 81623620]

約数ペア:

[(1, 81623620), (2, 40811810), (4, 20405905), (5, 16324724), (10, 8162362), (13, 6278740), (19, 4295980), (20, 4081181), (26, 3139370), (31, 2633020), (38, 2147990), (41, 1990820), (52, 1569685), (62, 1316510), (65, 1255748), (76, 1073995), (82, 995410), (95, 859196), (124, 658255), (130, 627874), (155, 526604), (164, 497705), (169, 482980), (190, 429598), (205, 398164), (247, 330460), (260, 313937), (310, 263302), (338, 241490), (380, 214799), (403, 202540), (410, 199082), (494, 165230), (533, 153140), (589, 138580), (620, 131651), (676, 120745), (779, 104780), (806, 101270), (820, 99541), (845, 96596), (988, 82615), (1066, 76570), (1178, 69290), (1235, 66092), (1271, 64220), (1558, 52390), (1612, 50635), (1690, 48298), (2015, 40508), (2132, 38285), (2356, 34645), (2470, 33046), (2542, 32110), (2665, 30628), (2945, 27716), (3116, 26195), (3211, 25420), (3380, 24149), (3895, 20956), (4030, 20254), (4940, 16523), (5084, 16055), (5239, 15580), (5330, 15314), (5890, 13858), (6355, 12844), (6422, 12710), (6929, 11780), (7657, 10660), (7790, 10478), (8060, 10127)]