81559520

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{101}}^1\times {\mathrm{103}}^1$

素因数の和:233

約数の個数: 144

約数和(自身を含む): 228559968

約数和(自身を除く): 147000448

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 101, 103, 112, 140, 160, 196, 202, 206, 224, 245, 280, 392, 404, 412, 490, 505, 515, 560, 707, 721, 784, 808, 824, 980, 1010, 1030, 1120, 1414, 1442, 1568, 1616, 1648, 1960, 2020, 2060, 2828, 2884, 3232, 3296, 3535, 3605, 3920, 4040, 4120, 4949, 5047, 5656, 5768, 7070, 7210, 7840, 8080, 8240, 9898, 10094, 10403, 11312, 11536, 14140, 14420, 16160, 16480, 19796, 20188, 20806, 22624, 23072, 24745, 25235, 28280, 28840, 39592, 40376, 41612, 49490, 50470, 52015, 56560, 57680, 72821, 79184, 80752, 83224, 98980, 100940, 104030, 113120, 115360, 145642, 158368, 161504, 166448, 197960, 201880, 208060, 291284, 332896, 364105, 395920, 403760, 416120, 509747, 582568, 728210, 791840, 807520, 832240, 1019494, 1165136, 1456420, 1664480, 2038988, 2330272, 2548735, 2912840, 4077976, 5097470, 5825680, 8155952, 10194940, 11651360, 16311904, 20389880, 40779760, 81559520]

約数ペア:

[(1, 81559520), (2, 40779760), (4, 20389880), (5, 16311904), (7, 11651360), (8, 10194940), (10, 8155952), (14, 5825680), (16, 5097470), (20, 4077976), (28, 2912840), (32, 2548735), (35, 2330272), (40, 2038988), (49, 1664480), (56, 1456420), (70, 1165136), (80, 1019494), (98, 832240), (101, 807520), (103, 791840), (112, 728210), (140, 582568), (160, 509747), (196, 416120), (202, 403760), (206, 395920), (224, 364105), (245, 332896), (280, 291284), (392, 208060), (404, 201880), (412, 197960), (490, 166448), (505, 161504), (515, 158368), (560, 145642), (707, 115360), (721, 113120), (784, 104030), (808, 100940), (824, 98980), (980, 83224), (1010, 80752), (1030, 79184), (1120, 72821), (1414, 57680), (1442, 56560), (1568, 52015), (1616, 50470), (1648, 49490), (1960, 41612), (2020, 40376), (2060, 39592), (2828, 28840), (2884, 28280), (3232, 25235), (3296, 24745), (3535, 23072), (3605, 22624), (3920, 20806), (4040, 20188), (4120, 19796), (4949, 16480), (5047, 16160), (5656, 14420), (5768, 14140), (7070, 11536), (7210, 11312), (7840, 10403), (8080, 10094), (8240, 9898)]