1381279120

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{21773}}^1$

素因数の和:21860

約数の個数: 80

約数和(自身を含む): 3515368752

約数和(自身を除く): 2134089632

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 61, 65, 80, 104, 122, 130, 208, 244, 260, 305, 488, 520, 610, 793, 976, 1040, 1220, 1586, 2440, 3172, 3965, 4880, 6344, 7930, 12688, 15860, 21773, 31720, 43546, 63440, 87092, 108865, 174184, 217730, 283049, 348368, 435460, 566098, 870920, 1132196, 1328153, 1415245, 1741840, 2264392, 2656306, 2830490, 4528784, 5312612, 5660980, 6640765, 10625224, 11321960, 13281530, 17265989, 21250448, 22643920, 26563060, 34531978, 53126120, 69063956, 86329945, 106252240, 138127912, 172659890, 276255824, 345319780, 690639560, 1381279120]

約数ペア:

[(1, 1381279120), (2, 690639560), (4, 345319780), (5, 276255824), (8, 172659890), (10, 138127912), (13, 106252240), (16, 86329945), (20, 69063956), (26, 53126120), (40, 34531978), (52, 26563060), (61, 22643920), (65, 21250448), (80, 17265989), (104, 13281530), (122, 11321960), (130, 10625224), (208, 6640765), (244, 5660980), (260, 5312612), (305, 4528784), (488, 2830490), (520, 2656306), (610, 2264392), (793, 1741840), (976, 1415245), (1040, 1328153), (1220, 1132196), (1586, 870920), (2440, 566098), (3172, 435460), (3965, 348368), (4880, 283049), (6344, 217730), (7930, 174184), (12688, 108865), (15860, 87092), (21773, 63440), (31720, 43546)]