721445820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{263}}^1\times {\mathrm{349}}^1$

素因数の和:755

約数の個数: 96

約数和(自身を含む): 2049062400

約数和(自身を除く): 1327616580

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 131, 262, 263, 349, 393, 524, 526, 655, 698, 786, 789, 1047, 1052, 1310, 1315, 1396, 1572, 1578, 1745, 1965, 2094, 2620, 2630, 3156, 3490, 3930, 3945, 4188, 5235, 5260, 6980, 7860, 7890, 10470, 15780, 20940, 34453, 45719, 68906, 91438, 91787, 103359, 137157, 137812, 172265, 182876, 183574, 206718, 228595, 274314, 275361, 344530, 367148, 413436, 457190, 458935, 516795, 548628, 550722, 685785, 689060, 914380, 917870, 1033590, 1101444, 1371570, 1376805, 1835740, 2067180, 2743140, 2753610, 5507220, 12024097, 24048194, 36072291, 48096388, 60120485, 72144582, 120240970, 144289164, 180361455, 240481940, 360722910, 721445820]

約数ペア:

[(1, 721445820), (2, 360722910), (3, 240481940), (4, 180361455), (5, 144289164), (6, 120240970), (10, 72144582), (12, 60120485), (15, 48096388), (20, 36072291), (30, 24048194), (60, 12024097), (131, 5507220), (262, 2753610), (263, 2743140), (349, 2067180), (393, 1835740), (524, 1376805), (526, 1371570), (655, 1101444), (698, 1033590), (786, 917870), (789, 914380), (1047, 689060), (1052, 685785), (1310, 550722), (1315, 548628), (1396, 516795), (1572, 458935), (1578, 457190), (1745, 413436), (1965, 367148), (2094, 344530), (2620, 275361), (2630, 274314), (3156, 228595), (3490, 206718), (3930, 183574), (3945, 182876), (4188, 172265), (5235, 137812), (5260, 137157), (6980, 103359), (7860, 91787), (7890, 91438), (10470, 68906), (15780, 45719), (20940, 34453)]