128245520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{317}}^1\times {\mathrm{389}}^1$

素因数の和:732

約数の個数: 80

約数和(自身を含む): 322948080

約数和(自身を除く): 194702560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 317, 389, 520, 634, 778, 1040, 1268, 1556, 1585, 1945, 2536, 3112, 3170, 3890, 4121, 5057, 5072, 6224, 6340, 7780, 8242, 10114, 12680, 15560, 16484, 20228, 20605, 25285, 25360, 31120, 32968, 40456, 41210, 50570, 65936, 80912, 82420, 101140, 123313, 164840, 202280, 246626, 329680, 404560, 493252, 616565, 986504, 1233130, 1603069, 1973008, 2466260, 3206138, 4932520, 6412276, 8015345, 9865040, 12824552, 16030690, 25649104, 32061380, 64122760, 128245520]

約数ペア:

[(1, 128245520), (2, 64122760), (4, 32061380), (5, 25649104), (8, 16030690), (10, 12824552), (13, 9865040), (16, 8015345), (20, 6412276), (26, 4932520), (40, 3206138), (52, 2466260), (65, 1973008), (80, 1603069), (104, 1233130), (130, 986504), (208, 616565), (260, 493252), (317, 404560), (389, 329680), (520, 246626), (634, 202280), (778, 164840), (1040, 123313), (1268, 101140), (1556, 82420), (1585, 80912), (1945, 65936), (2536, 50570), (3112, 41210), (3170, 40456), (3890, 32968), (4121, 31120), (5057, 25360), (5072, 25285), (6224, 20605), (6340, 20228), (7780, 16484), (8242, 15560), (10114, 12680)]