128535980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{257}}^1\times {\mathrm{1471}}^1$

素因数の和:1754

約数の個数: 48

約数和(自身を含む): 287110656

約数和(自身を除く): 158574676

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 257, 340, 514, 1028, 1285, 1471, 2570, 2942, 4369, 5140, 5884, 7355, 8738, 14710, 17476, 21845, 25007, 29420, 43690, 50014, 87380, 100028, 125035, 250070, 378047, 500140, 756094, 1512188, 1890235, 3780470, 6426799, 7560940, 12853598, 25707196, 32133995, 64267990, 128535980]

約数ペア:

[(1, 128535980), (2, 64267990), (4, 32133995), (5, 25707196), (10, 12853598), (17, 7560940), (20, 6426799), (34, 3780470), (68, 1890235), (85, 1512188), (170, 756094), (257, 500140), (340, 378047), (514, 250070), (1028, 125035), (1285, 100028), (1471, 87380), (2570, 50014), (2942, 43690), (4369, 29420), (5140, 25007), (5884, 21845), (7355, 17476), (8738, 14710)]